Iran tipped off Russia about the possibility of a major "terrorist operation" on its soil ahead of the concert hall massacre near Moscow last month, three sources familiar with the matter said. In the deadliest attack inside Russia in 20 years, gunmen opened fire with automatic weapons at concertgoers on March 22 at the Crocus City Hall, killing at least 144 people in violence claimed by the Islamic State extremist group. "Days before the attack in Russia, Tehran shared information with Moscow about a possible big terrorist attack inside Russia that was acquired during interrogations of those arrested in connection with deadly bombings in Iran," said one source. Reuters didn't further identify the sources. Kremlin spokesman Dmitry Peskov said he had no information about reports of a warning from Iran, while Tehran didn't immediately comment.
Iran Alerted Russia Before Moscow Attack, Sources Say
The attack at the Crocus City Hall near Moscow left more than 140 people dead.