Officials expect higher frequency of ISIS attacks in Europe

The Associated Press has reportedly learned that over 400 ISIS fighters have been trained to target Europe. The group has deployed semi-autonomous, interlocking terrorist cells, like those that targeted Paris (France) and Brussels (Belgium), ordering them to chose the time, place and method for creating maximum carnage. French speakers with links to Belgium, France and North Africa, are reportedly leading units and are responsible for developing attack strategies. Those involved have had significant training in explosives, surveillance, and battleground strategy. A security official said that the emphasis had shifted from killing large numbers to conducting more attacks. He commented: “It’s more about the rhythm of terror operations now.”

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Isis has trained at least 400 fighters to target Europe in deadly waves of attacks, deploying interlocking terror cells like the ones that struck Brussels and Paris with orders to choose the time, place and method for maximum carnage, The Associated Press has learned.

The network of agile and semiautonomous cells shows the reach of the extremist group in Europe even as it loses ground in Syria and Iraq. The officials, including European and Iraqi intelligence officials and a French lawmaker who follows the jihadi networks, described camps in Syria, Iraq and possibly the former Soviet bloc where attackers are trained to attack the West.

Before being killed in a police raid, the ringleader of the Paris attacks claimed to have entered Europe in a multinational group of 90 fighters, who scattered "more or less everywhere."

But the biggest break yet in the Paris attacks investigation — the arrest on Friday of fugitive Salah Abdeslam— did not thwart the multipronged attack just four days later on the Belgian capital's airport and metro that left 31 people dead and an estimated 270 wounded. Three suicide bombers also died.

Brussels attacks: tributes are paid to the victims Show all 27 1 / 27 Brussels attacks: tributes are paid to the victims Brussels attacks: tributes are paid to the victims Wreaths of flowers in front of an entrance of the Maalbeek subway station in Brussels in homage to the victims of a terrorist attack. Getty Images Brussels attacks: tributes are paid to the victims Wreaths of flowers in front of an entrance of the Maalbeek subway station in Brussels in homage to the victims of a terrorist attack. Getty Images Brussels attacks: tributes are paid to the victims A building illuminated with the Belgian flag colours and a heart in Brussels, two days after suicide bombing attacks of terrorists on March 22 in Zaventem airport and subway Maelbeek. Getty Images Brussels attacks: tributes are paid to the victims A picture taken on 24 March, 2016 on place de la Bourse in Brussels, shows drawings and a candle, two days after suicide bombing attacks of terrorists on March 22 in Zaventem airport and Brussels subway Maelbeek Getty Images Brussels attacks: tributes are paid to the victims Candles are displayed in tribute to the Brussels attacks victims on 24 March, 2016 on place de la Bourse in Brussels, two days after the suicide bombing attacks of terrorists on 22 March. Getty Images Brussels attacks: tributes are paid to the victims A mourner lights a candle in Trafalgar Square during a candlelit vigil in support of the victims of the recent terror attacks in Brussels. Getty Images Brussels attacks: tributes are paid to the victims Brussels airport workers pay tribute to the victims near Zaventem Getty Images Brussels attacks: tributes are paid to the victims Activists light candles and hold placards to condemn the terrorist attacks in Belgium, during a gathering in Manila, Philippines Brussels attacks: tributes are paid to the victims A banner for the victims of the bombings reads "I am Brussels" at the Place de la Bourse in the center of Brussels Brussels attacks: tributes are paid to the victims European Commission President Jean-Claude Juncker, left front center, stands with front row, left to right, French Prime Minister Manuel Valls, Belgium's King Philippe, Belgium's Queen Mathilde and Belgian Prime Minister Charles Michel as well as members of the European Commission during a minute of silence at EU headquarters in Brussels Brussels attacks: tributes are paid to the victims People join hands in solidarity near the former stock exchange following the bomb attacks in Brussels Brussels attacks: tributes are paid to the victims Belgium flags ornate the facade of the Paris Town Hall Brussels attacks: tributes are paid to the victims A woman embraces her children at The Place de la Bourse as she pays her respects to victims of the terrorists attacks in Brussels Brussels attacks: tributes are paid to the victims Belgian and European Union flags fly at half mast following the bomb attacks in Brussels Brussels attacks: tributes are paid to the victims Candles in the colors of the Belgian national flag are lit inside the Belgian embassy in Madrid, a day after the deadly suicide attacks on the Brussels airport and its subway system Brussels attacks: tributes are paid to the victims Servicemen of Azov, Ukrainian volunteers battalion, hold torches in front of floral tributes during a ceremony in front of the Belgian embassy in Kiev, in tribute to the victims of Brussels attacks Brussels attacks: tributes are paid to the victims A refugee boy holds up a placard reading "Sorry for Brussels" at a refugee camp near the Greek-Macedonian border Brussels attacks: tributes are paid to the victims Brussels tributes People light candles in tribute to victims at a makeshift memorial at the Place de la Bourse in Brussels Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes A woman holds a drawing by French cartoonist Plantu picturing a character made of a French flag consoling another made of the Belgian flag, in front of the Hotel de Ville in Paris Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes The colours of the Belgian flag are projected on to (clockwise from top left) the Eiffel Tower in Paris, the town council building in Belgrade, Rome's Campidoglio and the Royal Palace at Dam Square in Amsterdam Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes Candles are lit in tribute to the victims, at the Place de la Bourse in Brussels Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes A woman holds a placard reading "Paris hearts Belgium, How much time will it take us to open our eyes and say STOP, Today our hearts are broken, Open your eyes to change the future" at the Place de la Republique in Paris Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes People gather to pay a tribute to victims of terrorist attacks in Brussels Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes People write messages on the ground at Place de la Bourse in Brussels Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes A bouquet of flowers in the Belgian national colours with a card reading 'To our neighbours, to our friends, to our Belgian brothers - an indignant Parisian' is seen next to a French national flag at the fence of the Belgian embassy in Paris Getty Images Brussels attacks: tributes are paid to the victims Brussels tributes Solidarity messages are written in chalk outside the stock exchange in Brussels AP Brussels attacks: tributes are paid to the victims Brussels tributes Messages and floral tributes outside the Brussels stock exchange AP

Just as in Paris, Belgian authorities were searching for at least one fugitive in Tuesday's attacks — this time for a man seen on security footage in the airport with the two suicide attackers. The fear is that the man, whose identity Belgian officials say is not known, will find Abdeslam's path instructive.

After fleeing Paris immediately after the November attacks, Abdeslam forged a new network back in his childhood neighborhood of Molenbeek, long known as a haven for jihadis, and renewed plotting, according to Belgian Foreign Minister Didier Reynders

"Not only did he drop out of sight, but he did so to organize another attack, with accomplices everywhere. With suicide belts. Two attacks organized just like in Paris. And his arrest, since they knew he was going to talk, it was a response: So what if he was arrested? 'We'll show you that it doesn't change a thing,"' said French Senator Nathalie Goulet, co-head of a commission tracking jihadi networks.

Salah Abdeslam was arrested in Brussels

Estimates range from 400 to 600 Isis fighters trained specifically for external attacks, according to the officials, including Ms Goulet. Some 5,000 Europeans have gone to Syria.

"The reality is that if we knew exactly how many there were, it wouldn't be happening," she said.

Two of the suicide bombers in Tuesday's attacks, brothers Ibrahim and Khalid el-Bakraoui, had no known extremist links until an apartment one of them rented was traced to Abdeslam last week, according to Belgian state broadcaster RTBF. Similarly, an Algerian killed inside that apartment on March 15 had nothing but a petty theft record in Sweden — but he'd signed up as an Isissuicide bomber for the group in 2014 and returned to Europe as part of the Nov. 13 plot.

In claiming responsibility, Isis described a "secret cell of soldiers" dispatched to Brussels for the purpose. The shadowy cells were confirmed by Europol — the EU police agency which said in a late January report that intelligence officials believed the group had "developed an external action command trained for special forces-style attacks."

French speakers with links to North Africa, France and Belgium appear to be leading the units and are responsible for developing attack strategies in Europe, said a European security official who spoke on condition of anonymity because he was not authorized to speak about briefing material. He is also familiar with interrogations of former fighters who have returned to Europe. Some were jailed after leaving IS while others were kicked out of the terror group. The fighters include Muslims and Muslim converts from all across Europe.

Fighters in the units are trained in battleground strategies, explosives, surveillance techniques and counter surveillance, the security official said.

"The difference is that in 2014, some of these IS fighters were only being given a couple weeks of training," he said. "Now the strategy has changed. Special units have been set up. The training is longer. And the objective appears to no longer be killing as many people as possible but rather to have as many terror operations as possible, so the enemy is forced to spend more money or more in manpower. It's more about the rhythm of terror operations now."

Shocking attacks in Belgium

Similar methods had been developed by al-Qaida but Isis has taken it to a new level, he said. Another difference with these "external operation" units is that fighters are being trained to be their own operators — not necessarily to be beholden to specific orders from the IS stronghold in Raqqa, Syria or elsewhere.

In the case of Tuesday's attacks, Abdeslam's arrest may have been a trigger for a plot that was already far along.

"This was not put together as a response to the arrest. However the timing of what has happened over the last few days has maybe hurried up the planning and execution," said Magnus Ranstorp, a Swedish security analyst. "I see the link to the environments either in France or in Belgium. Whether they're logistically linked ... they're probably part of the same batch of extremists that have come out of Syria."

Several security officials have said there is growing evidence to suggest the bulk of the training is taking place in Syria, Libya and elsewhere in North Africa.

"To pull off an attack of this sophistication, you need training, planning, materials and a landscape," said Shiraz Maher, a senior research fellow at the International Centre for the Study of Radicalisation in London.

Mr Maher has conducted extensive interviews with foreign fighters. The research center, based at Kings College in London, has one of the largest databases of fighters and their networks.

"Even if they worked flat out, the attackers in Brussels would have needed at least four days," Mr Maher said.

The question for many intelligence and security officials is now turning to just how many more fighters have been trained and are ready for more attacks.

A senior Iraqi intelligence official who was not authorized to speak publicly said people from the cell that carried out the Paris attacks are scattered across Germany, Britain, Italy, Denmark and Sweden. Recently, a new group crossed in from Turkey, the official said.

The latest new name to surface this week, Najim Laachraoui, turned out to be a Brussels resident with a degree in mechanical engineering — the bombmaker who made the suicide vests used in the Paris attacks, according to French and Belgian officials. Attackers used an explosive known as Triacetone Triperoxide, or TATP, made from common household chemicals.

Fifteen kilos of TATP were found in an apartment linked to the Brussels attackers, along with other explosive material, although Laachraoui has not been publicly linked to the latest attack.

And Laachraoui, like the unidentified man seen wearing a white jersey at the Brussels airport on Tuesday, remains at large, a fugitive link in a chain still being forged.

Associated Press