Officials in Russia have reported that two people have been detained after a metro train derailed in Moscow on Tuesday, leaving 22 dead and hundreds injured.
Moscow residents have been leaving flowers outside metro stations across the Russian capital today. Hundreds of people have also been queuing up to give blood to help the 136 people who were injured in the crash.
I was profoundly shocked by yesterday's events, and the only thing I can do is come here today and give blood. It is the contribution that every healthy person can make, who wants to help those who were injured yesterday.
Investigative Committee spokesman Vladimir Markin ruled out the possibility that it was related to terrorism, saying: "There are no signs of a terrorist attack, so most likely it is an industrial accident".
The number of people killed after a rush-hour subway train derailed in Moscow has risen to 10, according to emergency officials.
Several cars left the track in the tunnel after a power surge triggered an alarm, which caused the train to stop abruptly.
City Hall officials have given the death toll as 10. More than 100 people have been taken to hospital and 50 are in grave condition, Itar-TASS said, quoting Moscow's health department chief, Georgy Golukhov.