Eight men have been arrested in relation to Nice attack
The Paris prosecutor's office has said eight men of Tunisian and French origin have been arrested in the Alpes-Maritimes region in connection with the Nice attack of 14 July, which killed more than 80 people and left more than 400 others injured. All the suspects have links to Mohamed Lahouaiej-Bouhlel, the man who drove the lorry into the crowds celebrating Bastille Day on the Promenade des Anglais. The eight men remain in custody.

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French police have arrested eight new suspects in connection with the Nice attack.

The Paris prosecutors' office said they are all linked to Mohamed Lahouaiej-Bouhlel, the Tunisian Isis supporter who carried out the massacre.

He drove a lorry into crowds of people celebrating Bastille Day in the Riviera city on 14 July, killing 84 people and injuring more than 400 others before being shot dead. Two more victims have subsequently died in hospital.

Security Stepped Up Across France Following Nice Attack

The eight men, who are Tunisian and French, were arrested on Monday in France's Alpes-Maritimes region and remain in custody.

The arrests came as French and Belgian prosecutors continue investigations into the Paris and Brussels attacks, which were carried out by linked cells of Isis militants.

Belgium's federal prosecutor extended the custody of three suspects last week - Yasin A, Rabah M and Abderrahmane A, who were all arrested in connection with a foiled terror plot by Reda Kriket.

Both countries have been on a high state of alert since the 13 November attacks, were Isis militants armed with Kalashnikovs and suicide vests killed 130 people at Paris landmarks, restaurants and the Bataclan concert hall.

In pictures: Bastille Day Nice attack Show all 30 1 / 30 In pictures: Bastille Day Nice attack In pictures: Bastille Day Nice attack A man reacts near bouquets of flowers near the scene where a truck ran into a crowd at high speed killing scores and injuring more who were celebrating the Bastille Day national holiday in Nice Reuters In pictures: Bastille Day Nice attack A woman arrives with a toy and a bouquet of flowers as people pay tribute near the scene where a truck ran into a crowd in Nice Reuters In pictures: Bastille Day Nice attack A woman reacts as she places flowers in front of the memorial set on the 'Promenade des Anglais' where the truck crashed into the crowd during the Bastille Day celebrations in Nice EPA In pictures: Bastille Day Nice attack People gather to view the floral tributes near the site of the truck attack in the French resort city of Nice AP In pictures: Bastille Day Nice attack A man reacts near bouquets of flowers as people pay tribute near the scene where a truck ran into a crowd at high speed killing scores and injuring more who were celebrating the Bastille Day national holiday, in Nice Reuters In pictures: Bastille Day Nice attack Floral tributes are laid out near the site of the truck attack in the French resort city of Nice AP In pictures: Bastille Day Nice attack A child's toy is placed among the floral tributes laid out near the site of the truck attack in the French resort city of Nice AP In pictures: Bastille Day Nice attack Investigators continue at the scene near the heavy truck that ran into a crowd at high speed killing scores who were celebrating the Bastille Day in Nice Reuters In pictures: Bastille Day Nice attack Crime scene investigators work on the 'Promenade des Anglais' after the truck crashed into the crowd during the Bastille Day celebrations in Nice EPA In pictures: Bastille Day Nice attack A forensic expert examines dead bodies covered with a blue sheet on the Promenade des Anglais seafront in the French Riviera city of Nice Getty Images In pictures: Bastille Day Nice attack A forensic expert evacuates a dead body on the Promenade des Anglais seafront in the French Riviera city of Nice, after a gunman smashed a truck into a crowd of revellers celebrating Bastille Day Getty Images In pictures: Bastille Day Nice attack A man reacts as he sits near a French flag along the beachfront the day after a truck ran into a crowd at high speed killing scores celebrating the Bastille Day in Nice Reuters In pictures: Bastille Day Nice attack Discarded items are left on the beach, not far from the site of the truck attack in the French resort city of Nice AP In pictures: Bastille Day Nice attack Bullet holes in the windscreen of the lorry that was driven into the crowd at high speed Reuters In pictures: Bastille Day Nice attack A man walks through debris on the street in Nice, France, the morning after a lorry ran into a crowd, killing at least 84 and injuring 50 Reuters In pictures: Bastille Day Nice attack Rescue workers help an injured woman to get in a ambulance AFP/Getty Images In pictures: Bastille Day Nice attack Authorities investigate a truck after it plowed through Bastille Day revelers in the French resort city of Nice, France AP In pictures: Bastille Day Nice attack Celebrations of Bastille Day were targeted by the lorry driver AP In pictures: Bastille Day Nice attack People cross the street with their hands on thier heads as a French soldier secures the area after at least 84 people were killed along the Promenade des Anglais in Nice Reuters In pictures: Bastille Day Nice attack A paramedic attends one of the dozens of people injured in the Nice Bastille Day attack In pictures: Bastille Day Nice attack Soldiers march on street where the lorry crashed into the crowd REUTERS In pictures: Bastille Day Nice attack A man sits next to a body seen on the ground after at least 84 people were killed in Nice, when a truck ran into a crowd celebrating the Bastille Day national holiday Reuters In pictures: Bastille Day Nice attack Bodies are seen on the ground after at least 84 people were killed in Nice, when a truck ran into a crowd celebrating the Bastille Day national holiday Reuters In pictures: Bastille Day Nice attack Children were among the 84 killed in the atrocity, with around 50 more hospitalised Reuters In pictures: Bastille Day Nice attack French Interior Minister Bernard Cazeneuve (2nd L) speaks to the media in Nice AFP/Getty Images In pictures: Bastille Day Nice attack A man walks with his hands up as police officers carry out checks on people in the centre of French Riviera town of Nice AFP/Getty Images In pictures: Bastille Day Nice attack With injured people laying in the street police and onlookers react near to a truck in Nice AP In pictures: Bastille Day Nice attack Police officers, firefighters and rescue workers are seen at the site of the attack AFP/Getty Images In pictures: Bastille Day Nice attack Police officers speak with a soldier after a truck that ploughed into a crowd leaving a fireworks display in the French Riviera town of Nice AFP/Getty Images In pictures: Bastille Day Nice attack Police shine a light into the cab as they approach the driver's cab of a truck, in Nice AP

The massacres were followed by the bombings at Brussels Airport and Maalbeek Metro station, killing 32 people.

Isis has also claimed responsibility for a series of "lone wolf" attacks carried out by supporters, including the murder of a Catholic priest in Nice and attempted suicide bombing in Germany.

Lahouaiej-Bouhlel, who carried out the Nice attack, was born in Tunisia and moved to France in 2005, where he worked as a lorry driver.

He was not on France's "Fiche S" list of suspected extremists but was known to authorities for traffic offences and assaults.

Shortly before his attack, relatives said Lahouaiej-Bouhlel had been contacted by an Algerian Isis member and watched the group's gory propaganda videos.