British Prime Minister Gordon Brown on Sunday said Pakistan must do more to "break" al-Qaeda and find Osama bin Laden.
Brown told the BBC that eight years after the 2001 attacks on the US, nobody had been able "to spot or detain or get close to" the al-Qaeda leader.
Pakistan's
security services must join the "major effort" to isolate the terrorist group, he warned.
He said more progress was needed "in taking out" Bin Laden and his number two Ayman Zawahiri.