(Reuters) - Following is a timeline of some of the major attacks on Russian soil since the beginning of the first Chechen war in 1994 to the present day:
1994-1996 - Tens of thousands of people are killed in the first Chechen war.
June 1995 - Chechen rebels seize hundreds of hostages in a hospital in the southern Russian town of Budennovsk. More than 100 people are killed during the rebel assault and a botched Russian commando raid.
January 1996 - Chechen fighters take hundreds hostage in a hospital at Kizlyar in Dagestan, then move them by bus to Pervomaiskoye on the Chechen border. After being pounded by Russian military, most rebels escape but hostages are killed.
June 1996 - A bomb kills four and injures at least 10 in the Moscow metro system, in what officials said was the work of Chechen separatists though no one claims responsibility.
November 1996 - A bomb explodes in an apartment block where many Russian servicemen and their families live in the Dagestani city of Kaspiysk, killing 64.
March 19, 1999 - A bomb kills 50 in an outdoor market in Vladikavkaz, the capital of North Ossetia, one of two Christian-dominated regions in the troubled North Caucasus.
August 31, 1999 - A bomb explodes in an underground shopping center near the Kremlin in Moscow, injuring 20.
August/September 1999 - Hundreds of Russian soldiers are killed battling Chechen militants in the mountains of Dagestan. The second Chechen war begins. Tens of thousands are killed in the war. Russia re-establishes direct rule in 2000.
September 1999 - Bombs destroy apartment blocks in Moscow, Buynaksk and Volgodonsk. More than 200 people are killed. Moscow blames Chechens who in turn blame Russian secret services.
June 2-3, 2000 - Five suicide bomb attacks, carried out by Chechen rebels, on police stations and Russian army bases in Chechnya kill at least 54 people.
August 8, 2000 - A bomb kills 13 and wounds 90 in a crowded Moscow underpass.
March 24, 2001 - Three car bombs explode in the southern Russian cities of Mineralnye Vody, Yessentuki and in the North Caucasus region of Karachay-Cherkessia, killing 28.
May 9, 2002 - Forty-one people are killed by a bomb in the Dagestani city of Kaspiysk during a military parade.
October 23-26, 2002 - 129 hostages and 41 Chechen guerrillas are killed when Russian troops storm a Moscow theater where rebels had taken 700 people captive three days earlier. Most of the hostages are killed by gas used to knock out the Chechens.
December 27, 2002 - A suicide bomber drives a truck packed with explosives into a government building in Grozny, killing 60.
May 12, 2003 - Two drivers ram trucks full of explosives into a government building in Znamenskoye in northern Chechnya, killing 59 and injuring dozens.
July 5, 2003 - Two women suicide bombers kill 15 other people when they blow themselves up at an open-air rock festival at Moscow’s Tushino airfield. Sixty are injured.
August 1, 2003 - A suicide bomber driving a truck blows up a military hospital at Mozdok in North Ossetia bordering Chechnya, killing at least 50.
December 5, 2003 - An explosion tears through a morning commuter train just outside Yessentuki station in Russia’s southern fringe. Forty-six people are killed and 160 injured.
December 9, 2003 - A suicide bomber kills five other people near the Kremlin. At least 13 people are wounded.
February 6, 2004 - A suicide bombing kills at least 39 people and wounds more than 100 on an underground train in Moscow, in what police attribute to the work of Chechen separatists.
May 9, 2004 - Chechen leader Akhmad Kadyrov, the father of present Chechen president Ramzan Kadyrov, is killed by a bomb in Grozny along with six others. Fifty more are wounded.
June 22, 2004 - Rebels seize an interior ministry building in Ingushetia, near Chechnya, and attack other points in lightning attacks. At least 92 people are killed including the acting regional interior minister, Abukar Kostoyev.
August 24, 2004 - Two Russian passenger planes are blown up almost simultaneously, killing 90 people. One Tu-134, flying to Volgograd, goes down south of Moscow. Moments later a Tu-154 bound for Sochi crashes near Rostov-on-Don.
August 31, 2004 - A female suicide bomber blows herself up in central Moscow, killing 10 people and injures 51.
September 1-3, 2004 - 331 hostages — half of them children — die in a chaotic storming of School No.1 in Beslan, after it is seized by rebels demanding Chechen independence and an immediate end to the war.
August 21, 2006 - A bomb kills 10 people and injures 50 in a Moscow suburban market.
August 13, 2007 - A bomb derails the Nevsky Express between Moscow and St Petersburg, injuring 30 people.
August 17, 2009 - A suicide bomber drives a truck into the gates of the main police station in Nazran, the largest city in Ingushetia, killing 24 people and wounding at least 130 others.
November 27, 2009 - A bomb blast derails the Nevsky Express with about 700 people on board. At least 26 people are killed and 100 injured. Chechen rebels claim responsibility.
January 6, 2010 - At least seven policemen are killed in Dagestan when a suicide bomber detonates a car packed with explosives at a traffic police depot.
March 29, 2010 - At least two blasts strike Moscow metro stations during rush hour, killing 40 people.
March 31, 2010 - Two blasts rock Kizlyar in the North Caucasus region of Dagestan, killing nine people.
May 26, 2010 - A blast in the southern city of Stavropol kills eight people just before the start of a concert by a dance company linked with Kremlin-backed Ramzan Kadyrov.
September 9, 2010 - A suicide bomber kills 18 people in North Ossetia, a mostly Christian province in the North Caucasus.
January 24, 2011 - At least 35 people are killed and more than 130 injured in a suicide bombing at Moscow’s Domodedovo airport, Russia’s biggest.
Writing by David Cutler, London Editorial Reference Unit and Guy Faulconbridge and Amie Ferris-Rotman in Moscow; Editing by Sonya Hepinstall