Moscow concert hall attack suspects appear in court as Russia defends security services

The four men suspected of carrying out a brutal attack at a Moscow concert hall that killed at least 139 people have appeared in court on terror charges, as the Kremlin defended its security services criticized for failing to prevent the massacre.

Three of the suspects were bent double as they were marched into the Moscow courtroom late on Sunday night, while the fourth was in a wheelchair and appeared unresponsive.

The suspects, who are from the Central Asian republic of Tajikistan but worked in Russia on temporary or expired visas, were named by...