Timeline: Attacks linked to Chechnya
(CNN) -- The following are some of the major bomb attacks in, near or linked with Chechnya since fighting resumed between Russian forces and Chechen rebels in 1999:
June 7, 2000 - In the first attack of its kind in Chechnya, two Russian OMON special police are killed and five wounded in a suicide car-bombing in the village of Alkhan-Yurt, southwest of the regional capital Grozny.
July 2-3, 2000 - Chechen guerrillas launch five suicide bomb attacks on bases of Russian security forces within 24 hours. In the deadliest, at least 54 people are killed at a police commando dormitory in Argun, near Grozny. The Russian interior ministry for Chechnya based in Gudermes is also targeted. Six Russian troops are killed.
December 27, 2002 - Chechen suicide bombers ram vehicles into the local government headquarters in Grozny, bringing down the roof and floors of the four-storey building. Chechen officials say about 80 people killed.
May 12, 2003 - Two suicide bombers drive a truck full of explosives into a government administration and security complex in Znamenskoye, in northern Chechnya. Fifty-nine people are killed, and scores hurt.
May 14, 2003 - At least 16 people are killed in a suicide bomb attack during a religious festival in the town of Iliskhan-Yurt, east of Grozny. 145 are wounded.
June 5, 2003 - A woman bomber ambushes a bus carrying Russian air force pilots near Chechnya, blowing it up and killing herself and 18 other people.
July 5, 2003 - Two women suicide bombers kill 15 other people when they blow themselves apart at an open-air rock festival at Moscow's Tushino airfield. 60 are injured.
August 1, 2003 - A suicide bomber driving a truck packed with explosives blows up a military hospital in the town of Mozdok in North Ossetia bordering Chechnya. The blast kills at least 50.
September 3, 2003 - Six people are killed in an explosion on board a commuter train near the Northern Caucasus spa town of Pyatigorsk, but police say it is not the work of Chechen rebels.
December 5, 2003 - An explosion tears through a morning commuter train just outside Yessentuki station in the Stavropol region north of Chechnya. At least 36 people are killed and more than 150 injured.
February 6, 2004 - A powerful bomb rips through a packed Moscow subway train during the morning rush hour, killing 41 people.