The Moscow mayor's office named human factor as the cause of the accident in the metro on May 21
Because of the accident, three trains stopped, and passengers waited for evacuation for several hours. The cause of the accident on the Solntsevskaya line of the Moscow metro, which stopped three trains, was the actions of metro employees. The head of the Moscow Department of Transport, Maxim Liksutov, said this, reports . Moscow Speaks New metro stations have a huge margin of safety and carrying capacity, because the stations are built largely for the future.