A U.S. drone fired two to three missiles at a house in northwest Pakistan, close to the Afghan border, killing at least five people and wounding four others, officials said Monday.
The house was located in Miram Shah in North Waziristan.
There was no information on who was targeted in the attack, although the U.S., in recent months, has stepped up drone strikes on alleged Taliban and al-Qaida suspects in the region.
Pakistani intelligence officials told Reuters that the building was a veterinary clinic that was used as a hideout by militants.
Washington refuses to discuss publicly the covert drone program in Pakistan, but officials say privately it has killed several senior al-Qaida and Taliban commanders.
The officials spoke on condition of anonymity because they were not authorized to talk to the media.