Some earlier major bombings in India:
August 25, 2007: Bombs rip through crowded public areas in the southern city of Hyderabad, killing at least 42 people.
May 2007: A bomb at a historic Hyderabad mosque kills 11 people.
February 2007: Bombs detonate on train headed through northern India for Pakistan, killing 68 people.
September 2006: At least 30 people are killed and 100 injured in twin blasts at a mosque in Malegaon in western India.
July 2006: Seven bombs on Mumbai commuter trains kill more than 200 and injure more than 700 others.
March 2006: Twin bombings at a train station and a temple in the Hindu holy city of Varanasi kill 20 people. Kashmiri militants are blamed.
October 2005: Three bombs placed in busy New Delhi markets one day before a major Hindu festival kill 62 people and wound hundreds. India blames Kashmiri militants.
August 2003: Two taxis packed with explosives blow up outside a Mumbai tourist attraction and a busy market, killing 52 and wounding more than 100.
March 1993: Muslim underworld figures tied to Pakistani militants allegedly carry out a series of bombings on Mumbai's stock exchange along with trains, hotels and gas stations in the city, killing 257 people and wounding more than 1,100.