Timeline: Pakistan tainted with attacks in 2011

ISLAMABAD: The two bomb blasts which hit Pakistan on Tuesday are the latest in a series of deadly attacks which have killed more than 4,200 people in the past three and half years.

Here are some of the attacks since the beginning of 2011.

January 4: The governor of Pakistan's central Punjab province, Salman Taseer, is shot dead near his Islamabad home.

January 12: A suicide attack claimed by the Taliban on a police post leaves at least 18 dead, including 11 policemen, at Bannu in the northwest.

January 17: At least 18 are killed when a bus explodes in a minibus transporting Shia Muslims in the northwest.

February 10: 31 soldiers are killed by a suicide bomber who blows himself up at a military parade at Mardan in the north-west.

March 2: Gunmen shoot dead Catholic government minister Shahbaz Bhatti. Supporters of Al-Qaeda and the Pakistani Taliban claim responsibility.

March 8: At least 25 are killed in bomb explosions at a service station in the central town of Faisalabad.

March 9: At least 37 die when a suicide bomber blows himself up at a funeral at Peshawar in the north-west.

April 3: A double suicide bomb attack outside a shrine in Punjab kills 50 people.

April 21: An illegal gambling den in Karachi is bombed, killing 19 people.

April 22: Sixteen members of the paramilitary forces are killed in Taliban attacks on a checkpost being set up on the country's northwestern frontier.

April 26: At least 13 die when armed men attack and set fire to a passenger bus in Pakistan's southwest.

April 26: Four are killed when bomb attacks hit two buses carrying Pakistani navy officials in Karachi.