A strike by a US drone aircraft has killed 15 people near the Afghan border, Pakistani officials say.
They said missiles hit a suspected militant compound in the town of Mir Ali in the North Waziristan tribal region.
It is the third such attack in as many days in Pakistan's frontier tribal region, where the US is targeting al-Qaeda and Taliban militants.
The attacks, by pilotless aircraft, are deeply controversial in Pakistan.
Mir Ali, 25km (15 miles) east of Miranshah, capital of North Waziristan, is considered a hub of insurgent activity.
"Fifteen militants were killed in a dawn strike on a compound. The bodies of those killed were unable to be identified," a security official in Miranshah told AFP news agency.
He said there were unconfirmed reports that foreigners were among the dead.
Islamabad says the drone attacks fuel anti-US sentiment in the country and also claim civilian casualties along with militants.
Washington insists the strikes are highly effective.
The US and Pakistan are currently deadlocked in negotiations over the re-opening of overland supply routes to Nato forces in Afghanistan.
Pakistan blocked the routes last November after a US air strike on the Afghan border killed 24 Pakistani soldiers.
