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The attack occurs in North Waziristan

U.S. officials rarely discuss the CIA's drone program in Pakistan

Islamabad, Pakistan CNN  — 

At least four militants were killed Wednesday after a suspected U.S. drone strike in Pakistan, two Pakistani intelligence officials said.

The attack occurred at a compound in the area of Datakhel of North Waziristan, one of the seven districts of Pakistan’s tribal region bordering Afghanistan, the officials said.

U.S. officials rarely discuss the CIA’s drone program in Pakistan, though privately they have said the covert strikes are legal and an effective tactic in the fight against extremists.