( CNN ) -- A suspected U.S. drone strike killed three alleged militants in Pakistan 's tribal region Tuesday , intelligence officials in Pakistan said . The suspected drone fired two missiles on a vehicle believed to be carrying militants in the area of Angoor Adda of South Waziristan , one of the seven districts of Pakistan 's volatile tribal region bordering Afghanistan , two intelligence officials said . It was the 22nd suspected U.S. drone strike in Pakistan this year , compared with 111 in all of 2010 , according to a CNN count . The intelligence officials asked not be named because they were not authorized to speak to the media . Journalist Nasir Habib contributed to this report .
The suspected drone strike was the 22nd this year , according to a CNN report . It killed three suspected militants in Pakistan 's tribal areas , security officials said .