Sept. 7, 2011: 11 killed, 76 wounded

A powerful bomb hidden in a briefcase rips through a crowd of people waiting to enter a New Delhi courthouse.

An al-Qaeda-linked group claims responsibility, although government officials say it is too early to name a suspect.

The attack outside the High Court, the deadliest in India's capital in nearly three years, came despite a high alert across the city and renews doubts about India's ability to protect even its most important institutions despite overhauling security after the 2008 Mumbai siege.

July 13, 2011: 19 killed, 130 wounded

Three bomb blasts rock separate neighbourhoods of Mumbai during the evening rush hour. The government calls it an apparent terrorist attack as the blasts occurred at approximately the same time.

It was the first major attack on Mumbai since 10 Pakistani extremists went on a bloody rampage three years earlier.

No group has claimed responsibility and the Indian government has not named any suspects.

Dec. 7, 2010: One dead, 20 wounded

A bomb hidden in a metal canister explodes as thousands gathered for a Hindu ceremony in Varanasi, about 300 kilometres southeast of Lucknow. The blast kills a toddler and triggers a stampede that left many others wounded.

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Indian police inspects the site of a bombing in Pune, India, in which 10 people were killed and 60 injured. ((Rafiq Maqbool/Associated Press))

Feb. 13, 2010: 10 killed, 60 wounded

A bomb goes off in a bakery near a meditation centre in Pune, in western India, in the first major attack since the Mumbai bombings more than two years earlier.

Two groups calling themselves the Laskhar-e-Taiba Al Alami and the Mujahideen Islamic Muslim Front claimed they carried out the attack. But Indian anti-terrorism investigators arrested four people believed to be members of the Indian Mujahideen, a home-grown Islamic militant group. Indian authorities say the group is a militant front of the Students Islamic Movement of India, which they allege has close links with Lashkar-e-Taiba (LeT), a Pakistan-based militant group. The group gained attention when it claimed responsibility for a series of attacks in July 2008 in the western city of Ahmedabad that killed more than 45 people. The group's emails claiming responsibility for various attacks express anger at the treatment of Muslims in Hindu-majority India 

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A man carries a victim of a gun attack at the Chhatrapati Shivaji Terminus train station in 2008. (Rajanish Kakade/Associated Press)

Nov. 26, 2008: 164 killed, about 308 wounded

Gunmen launch a co-ordinated series of attacks at several central locations across Mumbai and take hostages at two luxury hotels. The attacks spanned three days and included one of the busiest railway terminals in the country.

The attacks were planned and carried out by LeT militants based in Pakistan. Only one of the 10 men who carried out the attacks was captured alive. LeT was banned in Pakistan in 2002. Analysts have said LeT was created with the help of Pakistan's intelligence agencies in the 1980s to act as a proxy fighting force in Indian Kashmir. Among its goals is the establishment of Islamic states in regions bordering Pakistan.

Sept. 27, 2008: One killed, 18 injured

An explosion in a crowded flower market in New Delhi kills a 13-year-old boy and injures 18 other people.

Sept. 14, 2008: At least 18 killed, at least 61 injured

Five bomb blasts in New Delhi go off just after sundown in crowded shopping areas.

The group Indian Mujahideen claims responsibility.

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Onlookers look at burnt vehicles and bodies at a blast site near a court in Gauhati, India, Oct. 30, 2008. ((Anupam Nath/AP))

Oct. 30, 2008:  At least 77 killed, more than 470 wounded

At least 41 people are killed as a result of four blasts in Gauhati, capital of the state of Assam, and 32 people are killed in three other towns in the state.

The area is wedged between Bangladesh, Bhutan, China and Burma, with only a thin corridor connecting it to the rest of India. It has been a hotbed of separatist violence, where more than 10,000 people were killed in the previous decade. Among the groups suspected of carrying out the attack is the United Liberation Front of Asom (ULFA), which was banned by the Indian government in 1990. The group has been fighting for independence for Assam. The group dropped its demand for independence as a condition for talks with India in January 2010.

Oct. 21, 2008: At least 14 killed, 14 wounded

A bomb explodes outside a police training centre in Imphal, in northeast India.

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People stand around the site of an explosion in Ahmadabad. ((Ajit Solanki/Associated Press))

July 26, 2008: At least 56 killed, more than 200 wounded

A series of 17 explosions goes off in the western city of Ahmedabad, all within an hour. The crudely made bombs are hidden in boxes and on bicycles.

A group called the Students Islamic Movement of India claims responsibility and several members of the organization are arrested in the days after the attacks. The group was founded in 1977 to establish an Islamic state in India. The Indian government banned the group in 2001. Some analysts believe the group also operates under the name of Indian Mujahideen.

July 25, 2008: Two killed, at least five wounded

Seven synchronized small bombs go off in Bangalore, India's high-tech hub.

May 13, 2008: At least 50 killed, up to 150 wounded

Six bomb explosions occur in India's tourist city of Jaipur, separated by a few minutes at most.

Dec. 13, 2007: Five killed, four wounded

A bomb tears through a moving train bound for New Delhi in India's remote northeast.

Nov. 23, 2007: At least 13 killed, dozens wounded

Three separate bomb attacks target courthouses in the northern cities of Lucknow, Varanasi and Faizabad. All the dead and most of the wounded are lawyers.

Oct. 15, 2007: At least six killed, at least 30 wounded

A bomb explodes in a packed movie theatre in Ludhiana, an industrial town in Punjab state.

Oct. 11, 2007:  At least two killed, 17 wounded

A bomb exploded at the shrine of Khwaja Moinuddin Chishti, a 12th-century Sufi Muslim saint, in Ajmer in northern India, just days before Eid al-Fitr, one of the holiest days in the Muslim calendar marking the end of Ramadan.

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A man mourns for a relative killed in one of the bombings in Hyderabad. ((Mahesh Kumar/Associated Press))

Aug. 25, 2007:  At least 42 killed, about 50 wounded

Two bombs explode minutes apart at a popular family restaurant and an amusement park in Hyderabad.

An Islamic fundamentalist organization — Harkat-ul-Jihad-al-Islami — is suspected of carrying out the attacks. The group is active in India, Pakistan and Bangladesh, and is believed to have links to the Taliban.

May 18, 2007:  13 killed, 35 wounded

A bomb rips through the 17th-century Mecca Masjid mosque in Hyderabad. Eleven people are killed in the blast and two more in subsequent clashes with police.

Feb. 19, 2007:  At least 66 killed

A train bursts into flames as it makes its way from New Delhi to Atari, a town on the border between India and Pakistan. The bomb explodes just before the train reaches the station in the village of Deewana, about 80 kilometres north of New Delhi. Many of the passengers are Pakistani.

Nov. 23, 2006: Three killed, nine wounded

A bomb placed near a train station in Gauhati in northeast India kills an 18-month-old boy and his parents.

Nov. 20, 2006:  At least eight killed, about 60 wounded

A bomb explodes and tears through two cars of a passenger train in a remote area of West Bengal state, near the Belacoba station, about 555 kilometres north of Calcutta.

Sept. 8, 2006:  31 killed, 100 wounded

Two bombs rigged to bicycles explode in a crowd of Muslim worshippers leaving Friday afternoon prayers at a mosque in Malegaon in Western India.

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People stand outside a train coach that was destroyed in a bomb blast, July 11, 2006. ((Press Trust of India/AP))

July 11, 2006:  As many as 200 killed, up to 700 wounded

Eight bombs explode on the suburban rail network in Mumbai, at seven different locations. Just hours earlier, suspected Islamist militants kill seven people — six of them tourists — in a series of grenade attacks in Srinagar, Indian Kashmir's main city.

March 7, 2006:  At least 20 people killed, and at least 62 injured

Three explosions hit a railway station and a temple in the Indian holy city of Varanasi.

Oct. 29, 2005:  At least 58 people killed, at least 80 people injured

Three explosions hit two crowded markets and a bus in New Delhi, prompting authorities to declare a state of emergency.

Oct. 3, 2004:  At least seven people killed, at least 57 injured

Bombings rock the northeastern province of Assam for the second day.

Oct. 2, 2004:  At least 44 people killed, more than 100 injured

Several bombs explode in the northeast states of Nagaland and Assam, including blasts at a railway station and a central market.

Aug. 15, 2004: 22 people killed

Bomb and grenade attacks hit Independence Day celebrations in Kashmir. Some of those killed are women and children.

Aug. 25, 2003:  52 killed, about 150 injured

Car bombs explode at a crowded jewelry market and the historic landmark, Gateway of India, in Mumbai at lunchtime.

Aug. 14, 2003:  6 killed, 13 wounded

A bridge is blown up in the northeastern state of Manipur.

July 29, 2003:  5 killed, at least 31 injured

A bomb rips through a crowded bus in Ghatkopar, a suburb of Mumbai.

March 13, 2003:  11 killed, 65 injured

A bomb explodes on a Mumbai train, a day after the 10th anniversary of multiple bomb explosions in 1993.

Dec. 2, 2002:  2 killed, 26 injured

A bomb explodes on a bus parked near a crowded Mumbai railway station.

March 12, 1993:  257 killed, more than 1,100 injured

A series of bombs hits Mumbai — the country's financial centre — including the country's largest stock exchange and three hotels.