(Reuters) - At least 37 people were killed on Monday when suicide bombers detonated explosives on two packed Moscow metro trains during morning rush hour.
Following is a timeline of bomb blasts in Moscow:
June 11, 1996 - A bomb explodes on the Moscow metro, killing four people and injuring 12.
July 11/12, 1996 - A bomb blows the front off a trolleybus in central Moscow during the morning rush hour, injuring five people. In a similar attack the next day, about 30 people are injured. The attacks are attributed to Chechen rebels.
-- Days later Chechen rebels deny involvement in the two blasts but warn that continued bloodshed in their breakaway territory could lead to “uncontrolled” acts of revenge.
Aug. 31, 1999 - A bomb explodes in an amusement arcade in the three-storey underground Manezh Square shopping complex, next door to the Kremlin. About 29 people are injured. Officials call it an act of terrorism but do not link it specifically to Chechen separatist militants.
Sept. 9, 1999 - A powerful bomb destroys an apartment block in southeast Moscow, killing 94 people and injuring more than 200 in what officials describe as a terrorist act.
Sept. 13, 1999 - A bomb destroys an eight-storey block of flats in Moscow, killing 118 people. Officials describe it as a terrorist attack and tighten security. Chechen fighters are blamed for the attack, although officials and warlords from the breakaway region deny responsibility.
Aug. 8, 2000 - An explosion rips through an underpass in central Moscow, killing 13 people and injuring dozens during rush hour.
Feb. 5, 2001 - A small bomb explodes in one of Moscow’s busiest underground railway stations during rush hour, injuring up to nine people and causing minor damage.
Oct. 19, 2002 - A bomb explodes in a crowded district of southwestern Moscow, killing one person and injuring seven people.
July 5, 2003 - Two female bombers kill 15 people when they blow themselves up at an open-air rock festival at Moscow’s Tushino airfield. Sixty are wounded.
Dec. 9, 2003 - An explosion in central Moscow kills six people. Officials blame the attack on Chechen female suicide bombers.
Feb. 6, 2004 - A powerful explosion, apparently set off by a suicide bomber, rips through a packed underground train in Moscow during the morning rush hour, killing at least 39 people and injuring more than 100.
Aug. 31, 2004 - A suicide bomb attack in central Moscow kills 10 people and injures 51.
Aug 21, 2006 - A bomb kills 10 people in a suburban Moscow
March 29, 2010 - At least two blasts strike Moscow metro stations during rush hour, killing 37 people and wounding 33.
-- The first goes off in a train at Lubyanka metro station, near the headquarters of Russia’s main domestic security service FSB. It kills at least 23 people. The second explodes on a train at Park Kultury station, killing at least 14.
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