Timeline: Terrorism in Russia
About 120 hostages and 50 rebels were killed in Moscow theater siege of 2002.
(CNN) -- The Moscow metro blast is feared to be the latest in a series of terrorist attacks in Russia that have killed hundreds of people. Here is a timeline of the most significant strikes since 1999:
August 31, 1999 - A bomb explodes in an underground shopping center near the Kremlin, injuring 20 people.
September 1999 - Bombs destroy apartment blocks in Moscow, Buynaksk and Volgodonsk, killing 200. The government blames Chechen rebels, who in turn accuse Russia's secret services. Then-Prime Minister Vladimir Putin responds by sending troops into Chechnya for the first time since 1997.
June 7, 2000 - In the first attack of its kind in the breakaway republic of Chechnya, two Russian special police are killed in a suicide car-bombing near the regional capital Grozny.
July 2-3, 2000 - Chechen guerrillas launch five suicide bomb attacks on bases of Russian forces within 24 hours. In the deadliest, at least 54 people are killed at a police base near Grozny.
August 8, 2000 - A bomb in a busy Moscow underpass kills eight people.
October 23, 2002 - About 50 Chechen rebels seize a Moscow theater and take about 800 hostages. After a three-day siege Russian forces storm the building using gas, killing most of the rebels and 120 hostages.
December 27, 2002 - Chechen suicide bombers ram vehicles into the local government headquarters in Grozny, bringing down the roof and floors of the four-story 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 kills at least 50 people at a military hospital in the town of Mozdok in North Ossetia bordering Chechnya.
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 on a commuter train in the Stavropol region north of Chechnya kills at least 36 people and injures more than 150.
December 9, 2003 - A suicide bomber in central Moscow kills at least five people.
February 6, 2004 - A rush-hour blast kills at least 30 people and injures 70 on a metro train in Moscow.