Updated

Pakistani intelligence officials say a suspected U.S. drone strike has killed at least three militants in a northwestern tribal region near the Afghan border.

They say two missiles hit a room of an abandoned seminary in Mussaki village in North Waziristan Saturday. Militants from Turkmenistan were among those at the seminary but the nationality of the dead was not immediately known.

The two officials spoke on condition of anonymity because they were not authorized to brief reporters.

North Waziristan is home to a mix of Pakistani, Afghan and al-Qaida-linked foreign militants.

The U.S. drone program causes extreme tension between Pakistan and the United States. Washington says it needs to send drones after militants because Pakistan refuses to engage them militarily. Pakistan says the strikes violate its sovereignty.