PESHAWAR: A U.S. drone strike killed four suspected militants in Pakistan's North Waziristan tribal region near the Afghan border on Sunday, intelligence officials and witnesses said, the first strike in almost a month.  

The controversial drone programme, a key element in U.S. counter-terrorism efforts, is highly unpopular in Pakistan, where it is considered a violation of sovereignty which causes
many civilian casualties.   

The remotely piloted aircraft targeted an abandoned girls' high school building used by militants in Miranshah, the main town in North Waziristan, the officials and witnesses said.

Three militants were wounded.  

"We intercepted internal conversation of the militants asking for arranging four coffins for the slain men in the drone attack. We don't know about their identity and nationality but
those living in the girls' school were mostly Arabs," a security official said.  

A local resident, Haji Niamat Khan, said more than two dozen militants were living in the school when it was attacked.

The last drone strike, on March 30, killed four suspected militants and wounded three in the same town of Miranshah, a known hotbed for Pakistan Taliban and foreign militants.  AGENCIES