Islamabad, Pakistan (CNN) -- Two militants were killed Tuesday in a drone attack in South Waziristan, a volatile tribal region in Northwest Pakistan, intelligence officials told CNN.
The unmanned drone fired two missiles at the village of Azam Warsak, which is near the border of Afghanistan, according to the officials, who could not be named because they are not authorized to speak to the media.
A growing number of suspected U.S. drone strikes in the tribal areas of Pakistan have been aimed at members of the Haqqani network, as have Special Forces operations in Afghanistan. The United States rarely comments on the drone strikes, but it's believed to be the only country operating in the region with the capability to use drones.
The attack comes amid strained relations between the United States and Pakistan, after top U.S. officials suggested ties between Pakistan's intelligence service and the Haqqani terrorist network. The Haqqani network is believed to be behind the September 13 attack on the U.S. Embassy in Kabul, Afghanistan.
Journalist Saboor Khattak contributed to this report