Life sentences are being sought for four men accused in the 2009 bombing of a Russian train that killed 27 people and injured more than 100, the Prosecutor General’s Office said on Tuesday.
The charges against them include terrorism, murder, attempted murder, and arms trafficking.
The other six members of an alleged terrorist organization, Muslim Brothers, are facing jail terms of 15 years.
All of the 10 defendants are residents of Russia’s North Caucasus Republic of Ingushetia.
Twenty-seven people were killed and 132 injured when a bomb equivalent to 7 kg (15 lbs) of TNT derailed the high-speed Nevsky Express from Moscow to St. Petersburg train on November 27, 2009.