London, Mar. 4 : Britain has asked Pakistan to dismantle the terror infrastructure inside its territory, and act sincerely against the terrorist groups operating from its soil.

Expressing concern over the terror attack on the Sri Lankan cricket team in Lahore, British Prime Minister Gordon Brown has said that a vast majority of Al-Qaeda operatives have taken refuge inside Pakistan.

"We know that the vast majority of Al-Qaeda fighters are now in Pakistan not in Afghanistan," Brown said.

Brown said that Islamabad must act sincerely against the outlawed organizations.

"We know that there are groups in Pakistan that are terrorist groups and need to be brought under control and arrested and brought to trial,” The News quoted Brown, as saying.

He urged Pakistan to fulfill its role in the international community by acting tough against the terrorists.

Earlier, Brown met the US President Barack Obama in Washington to discuss the prevailing situation in the sub-continent, including Afghanistan . (ANI)