Who could have attacked cricketers?

Gunmen attacked a bus carrying the Sri Lankan cricket team in the Pakistani city of Lahore yesterday, wounding six players, officials said.

A senior Pakistani official said the raid bore the hallmarks of the same militants who attacked India's financial capital Mumbai in November. India and the United States blamed the militant group Lashkar-e-Taiba for the three-day assault on Mumbai.

Following are the major militant groups operating in Pakistan who could be behind the attack.