DERA ISMAIL KHAN, Pakistan – Suspected American drones fired several missiles into three militant hideouts near the Afghan border on Sunday, killing nine Pakistani Taliban fighters, intelligence officials said.

The strikes targeted the group's hideouts in the South Waziristan tribal region, the three officials said, speaking on condition of anonymity because they were not authorized to talk to the media. The identity of the killed militants was not immediately known, they said, but two important commanders of the Pakistani Taliban – including the head of a training unit for suicide bombers – may be among them.

Sunday's drone attack was the third suspected U.S. drone strike in five days. One such hit late Wednesday night killed a top Pakistani militant commander, Maulvi Nazir, accused of carrying out deadly attacks against American and other targets across the border in Afghanistan. That attack was followed close on by another strike on Thursday in the North Waziristan tribal area.