TIMELINE: Major bomb attacks in Pakistan

(Reuters) - Two suicide bombers blew themselves up outside Pakistan's main defence industry complex on Thursday as workers were leaving at the end of their shift, killing nearly 50 people, police said.

Here is a timeline of some of the worst bomb attacks since former Prime Minister Benazir Bhutto's death at the end of 2007:

December 27, 2007 - Bhutto is killed in a bomb attack after a rally in Rawalpindi. More than 20 others are also killed.

January 10, 2008 - A suicide bomber walks up to policemen outside the High Court in Lahore and sets off explosives. Nineteen people are killed, 16 policemen and 3 passers-by.

February 22 - A roadside bomb kills 13 members of a wedding party, including the bride, in Swat.

February 29 - A suicide attack on a police funeral in the district of Swat kills 40 people.

March 2 - At least 40 people are killed when a suicide bomber attacks a traditional tribal meeting in the tribal region of Darra Adam Kheil.

March 11 - Two suicide car bombers strike, killing 24 people, most of them in an attack on a government security office in Lahore.

March 15 - A bomb attack at an Italian restaurant in Islamabad, a favorite hangout for foreigners, kills a Turkish woman and wounds several others, including four FBI agents.

June 2 - A suicide bomber blows up a car outside the Danish embassy in Islamabad, killing at least six people and wounding about 20.

July 6 - About 18 people are killed in a suicide attack on police guarding Islamists who were marking the anniversary of an army commando raid on the Red Mosque in Islamabad.

Aug 12 - Thirteen people are killed and 10 wounded in a bomb attack, claimed by the Taliban, on an air force bus in the northwestern city of Peshawar.

Aug 19 - A suspected suicide bomber kills 23 people in the compound of a hospital in Dera Ismail Khan, 280 km (175 miles) southwest of Islamabad, as Shi'ite Muslims were protesting against the killing of a leader.

Aug 21 - Two suicide bombers blow themselves up outside the main defence industry complex in Wah, 30 km (20 miles) northwest of Islamabad. Nearly 50 people are killed and about 70 wounded.

(Writing by David Cutler and Jijo Jacob; Additional writing by Carl Bagh;)