In a separate incident, gunmen ambushed a police patrol today in the northwestern city of Peshawar, killing three police officers and wounding six, said local police official Saeed Khan. No one claimed the attack.
The two intelligence officials said the compound hit late yesterday in the Shawal area of North Waziristan belonged to Islamic militants loyal to an Afghan warlord and was also frequented by Uzbek fighters.
The officials say the identity of those killed has not yet been determined. They spoke on condition of anonymity because they were not authorized to talk to the media.
Pakistani military courts have meanwhile convicted and sentenced five Islamic militants to death over a series of attacks, the army said in a statement today.
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It said a sixth convicted militant was sentenced to life in prison.
The military said the convicts were involved in a jail break, sectarian attacks and the killing of polio workers. It said three belonged to the Pakistani Taliban and three to allied militant groups.
Pakistan's parliament voted to allow military courts to try civilians in terrorism cases after last year's Taliban attack on a school in Peshawar, which killed some 150 people, mostly students.