The Kremlin does not reveal who is responsible for the Moscow massacre. And Medvedev: 'Let's kill them all' The four arrested accused of terrorism.

The four alleged perpetrators of the attack on Crocus City Hall in Moscow, which killed 137 people, have been placed in pre-trial detention for two months by a court in the Russian capital. The defendants in courts with signs of blows, cuts and possible torture. One was even taken to the courtroom in a wheelchair wearing a hospital gown and trousers.