MOSCOW, December 11 - RAPSI. The special services have averted 92 acts of terrorism and stopped the activities of a number of criminal leaders since early this year, Federal Security Service (FSB) head Alexander Bortnikov said.

He stressed that over 600 criminals and their accomplices have been detained.

"This facilitated the resolution of such serious crimes as the Lubyanka and the Park Kultury metro bombings in 2010, the terrorist attack in the Domodedovo airport in 2011, and this year's terrorist attacks at a police station in Makhachkala," Bortnikov said.

Previously, Viktor Orlov, the head of the National Counter-Terrorism Committee, said over 260 acts of terrorism have been committed in Russia since the start of 2012.

He noted that 779 such crimes were committed in 2010, and 365 were committed in 2011.

The explosions at the Moscow metro stations Lubyanka and Park Kultury took place on March 29, 2010. Two Dagestani suicide bombers committed the attacks. The bombings claimed the lives of 41 people and injured 88. Caucasus Emirate leader Doku Umarov took responsibility for the bombings.

On January 24, 2011, a suicide bomber detonated a bomb in the Domodedovo airport's international arrivals hall, killing 37 people and injuring 172.

According to Investigative Committee spokesman Vladimir Markin, the terrorist act was also organized by Umarov.

On May 3, 2012, a suicide bomber exploded a vehicle near a police station in Makhachkala. When the Emergency Ministry and police units arrived to the area, a second bomb exploded in a nearby vehicle. About 100 people were injured. Thirty-seven police officers were injured and seven died. Two rescuers were also injured.