An injured passenger talks on the phone after several subway cars derailed in Moscow on July 15. (Photo: AFP) 
 
 At least 19 people have died and scores more have been injured after a rush-hour subway train derailed in Moscow on Tuesday, health officials said. 
 
 Some 150 people were injured, many of them hospitalized, Russian news agency ITAR-TASS said, quoting Moscow's health department chief, Georgy Golukhov. Around 50 people are in grave condition, he said. 
 
 
 
 The crash is said to have occurred after several cars left a track in a tunnel after a power surge triggered an alarm. 
 
 Photos on social media showed passengers walking along the tracks inside the dimly lit tunnel. 
 
 There have been 13 emergency incidents on Moscow's metro system so far this year but no one was injured in the earlier incidents, according to ITAR-TASS. Moscow's transit system has been targeted by terrorists in the past but Russian officials Tuesday dismissed terrorism as a possible cause. 
 
 Moscow's metro system is one of the world's oldest and most extensive. 
 
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 Media playback is unsupported on your device Media caption Passenger video shows the inside of the metro system after the derailment - Oleg Boldyrev reports from Moscow 
 
 The death toll in Tuesday's derailment on the Moscow metro now stands at 21, the Russian health ministry says. 
 
 Scores were injured, some seriously, when a packed commuter train braked abruptly between stations in the west of the city in the morning rush hour. 
 
 Some of those hurt were carried out of the tunnel on stretchers, with the most serious cases airlifted to hospital. 
 
 The cause of the crash - one of the worst incidents ever on the metro - is reported to be a power surge. 
 
 Image copyright AFP Image caption Scores of people were treated at the scene for their injuries 
 
 Image copyright Google Image caption The derailment happened in the west of the city 
 
 Image copyright Reuters Image caption Some of the injured passengers were carried out of the tunnel on stretchers 
 
 Image copyright Reuters Image caption The most seriously injured people were airlifted to hospital 
 
 The train derailed between Slaviansky Boulevard and Park Pobedy (Victory Park) stations in the west of the city. 
 
 Some 50 people were in a serious condition, the Itar-Tass news agency reported, quoting a health official. 
 
 "The train slowed down abruptly, the lights went off, and then there was a spark of fire and smoke. We were blocked in," one passenger told Russian TV. 
 
 Another, quoted by Reuters news agency, said: "We were trapped and only got out by some miracle. I thought it was the end. Many people were hurt, mostly in the front carriage because the cars ran into each other." 
 
 Media playback is unsupported on your device Media caption Passenger: 'I was inside a carriage. Then a sudden blow, I fell down'. 
 
 More than 1,100 people were evacuated 
 
 The packed commuter train was travelling from the north-west of Moscow to the city centre at the time of the crash. 
 
 The BBC's Artyom Liss, in Moscow, says the tunnel where crash happened was built about 10 years ago. 
 
 Critics accuse the authorities of spending too much on extending the metro system, and not enough on maintenance, our correspondent says. 
 
 President Vladimir Putin, who is currently visiting Brazil, has ordered a criminal investigation into the accident. 
 
 Park Pobedy is the deepest metro station in Moscow, 84m (275ft) underground, which made the rescue operation particularly hard. 
 
 No foreigners were among the injured, the Interfax news agency said. 
 
 Militant attacks on Russia's railways and transport networks have killed dozens of people in the past, but the emergencies ministry said there was no suspicion of such a cause in this case. 

 MOSCOW (AP) — A rush-hour subway train derailed Tuesday in Moscow, killing 20 people and sending 150 others to the hospital, many with serious injuries, Russian officials said. 
 
 CORRECTS GENDER - Paramedics carry an injured woman out from a subway station after a rush-hour subway train derailment, to be transported by a medical helicopter in Moscow, Russia, on Tuesday, July 15,... (Associated Press) 
 
 Paramedics, a police officer and a voluenteer carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway... (Associated Press) 
 
 Paramedics and a police officer carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed... (Associated Press) 
 
 Paramedics carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed in Moscow Tuesday, killing... (Associated Press) 
 
 In this frame grab provided by the Russian Ministry for Emergency Situations shows frame grab from a video showing rescue teams working inside the tunnel where several cars of the wrecked train look almost... (Associated Press) 
 
 Paramedics carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed in Moscow Tuesday, killing... (Associated Press) 
 
 Paramedics, a police officer and a volunteer carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train... (Associated Press) 
 
 Paramedics carry an injured woman from a subway station after a rush-hour subway train derailment to a medical helicopter in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed... (Associated Press) 
 
 Emergency Ministry firefighters carry an injured man out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed... (Associated Press) 
 
 CORRECTS GENDER - Paramedics carry an injured woman out from a subway station after a rush-hour subway train derailment in Moscow, Russia, on Tuesday, July 15, 2014. A rush-hour subway train derailed... (Associated Press) 
 
 The Russian capital's airports and transit systems have been hit by several terrorist attacks in the past two decades but multiple officials on Tuesday vigorously dismissed terrorism as a possible cause. 
 
 The Moscow Metro is one of the most famous subway systems in the world, known for its palatial interiors with mosaics, chandeliers and marble benches. Park Pobedy, where the derailment occurred, is Moscow's deepest metro station — 84 meters (275 feet) deep, which was making the rescue particularly difficult. The station serves the vast western park where Russia's World War II museum is located. 
 
 Russian emergency officials initially said several cars derailed in the tunnel after a power surge Tuesday morning triggered an alarm that caused the train to stop abruptly. But Vladimir Markin, spokesman for the Investigative Committee, told reporters later that a power surge was not the issue and that investigators were considering a fault in the train cars or the sinking of the roadbed among the possible causes. 
 
 Of the 150 people reported injured, at least 50 were in grave condition, Moscow health officials said. Over 1,100 people were evacuated from the train, which was stuck between two stations, in a rescue operation that has already lasted at least seven hours. 
 
 By late afternoon, rescuers had recovered seven bodies and were working to extract 12 more trapped in two wrecked train cars, said Alexander Gavrilov, deputy chief of the Moscow emergency services. One woman taken from the scene died in a Moscow hospital. 
 
 In a video issued by the Emergency Situations Ministry, rescuers could be seen working inside the tunnel where several wrecked train cars looked almost coiled, occupying the entire width of the tunnel. Workers were trying to force open the mangled doors of one car to retrieve dead bodies. 
 
 Earlier photos on social media showed passengers walking along the tracks inside the dimly lit tunnel. 
 
 Mayor Sergei Sobyanin told reporters that unnamed officials will not only be fired but also investigated and charged in the aftermath of the deadly derailment. He refused to elaborate on what charges they could face. 
 
 Traffic between the stations is likely to be suspended for at least two days, he said. 
 
 Dozens of injured people were carried out of the subway station on stretchers. Paramedics carried one woman covered with a blanket to the lawn by the famous Triumphal Arch and put her on a medical helicopter. 
 
 Several survivors sat on the sidewalk near the station's entrance in an apparent state of a shock, drinking water supplied by authorities on a hot summer day. 
 
 One man with a bloody cut on his brow told Rossiya 24 television outside the Park Pobedy station that he felt a jolt and the train abruptly came to a halt. 
 
 "There was smoke and we were trapped inside," he said. "It's a miracle we got out. I thought it was the end." 
 
 While technical glitches are regular occurrences in the Moscow Metro, the city's subway hasn't seen deadly accidents in decades. 
 
 Terrorism is another matter. More than 100 people have been killed in bombings on Moscow's subway trains or near stations since 2000, including two bomb blasts on the same day in 2010 that killed a total of 40 people. 

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– A power surge caused several cars of a Moscow subway train to fly off the tracks at the height of the morning’s rush hour, killing at least 20 people and injuring at least 150, reports the AP. At least 50 of those are thought to be injured seriously. About 200 people have been evacuated from the train, which is stuck between two stations in Russia’s capital. Although Russian news agency ITAR TASS is quoting the Russian health minister as saying one person is still trapped in the wreckage, emergency services personnel at the scene are speculating there are more. Photos on Twitter show a grisly scene, with bloodied passengers being carried out on stretchers and laid out on the ground for medical attention as helicopters transported the more seriously injured to nearby hospitals. Reports say that the power surge triggered an alarm, which caused the train to come to an abrupt halt between Slaviansky Boulevard and Park Pobedy stations in the western part of the city, according to the BBC. Hindering rescue efforts is the fact that the Park Pobedy station is the deepest station in Moscow, nestled 275 feet underground, says the AP. The tunnel where the crash took place was about 10 years old; the metro itself opened in 1935. Critics say that officials have spent too much time and money expanding the subway system and not paid enough attention to maintenance, the BBC report. There have been 13 emergency events on the metro so far this year, but no previous injuries, according to USA Today. One passenger who was evacuated told Rossiya 24 television, "There was smoke and we were trapped inside. It’s a miracle we got out. I thought it was the end."