By Joseph Wilkes Three of the four suspects charged with carrying out the concert hall attack in Moscow that killed more than 130 people have tonight admitted guilt in a Russian court. Moscow’s Basmanny District Court formally charged Dalerdzhon Mirzoyev, 32; Saidakrami Rachabalizoda, 30; Mukhammadsobir Faizov, 19; and Shamsidin Fariduni, 25, with committing a group terrorist attack resulting in the death of others. The offense carries a maximum sentence of life imprisonment. The court ordered that the men, all of whom are citizens of Tajikistan, be held in pre-trial custody until May 22. Mirz…