TIMELINE - Recent bomb attacks in Pakistan

(Reuters) - A suicide bomber walked up to policemen stationed outside the High Court in the Pakistani city of Lahore on Thursday and set off his explosives, killing 22 people, most of them police, officials said.

Here is a chronology of some of the worst bomb attacks since July 2007:

July 14, 2007 - Suicide car-bomber kills 24 paramilitary soldiers and wounds 29 in North Waziristan.

July 15 - Sixteen people, most of them paramilitary soldiers, are killed in ambush on patrol in Swat valley in North West Frontier Province (NWFP). Separately, suicide bomber targets police recruiting centre in Dera Ismail Khan in NWFP, killing 29.

July 17 - Suicide bomber kills 16 people outside court in Islamabad, where country's suspended chief justice, Iftikhar Chaudhry, was due to speak.

July 19 - Three suicide attacks in a single day in three towns kill at least 52 people.

July 27 - Suicide bomb attack in restaurant near Islamabad's Red Mosque kills 13 people, most of them policemen.

September 4 - Two suicide bombers kill 25 in Rawalpindi.

September 11 - Suicide bomber kills 16 people in northwest Dera Ismail Khan.