A suspected U.S. missile strike killed four people and wounded two others in Pakistan's tumultuous North Waziristan region, Pakistani military sources said Sunday.
A man inspects rubble in North Waziristan. It's unclear if the strike was one of two reported Sunday to CNN .
The Saturday strike hit a home in the village of Khatai Qila, the sources said, speaking on condition of anonymity because they are not authorized to speak to the media.
The attack was one of two suspected missile strikes on Saturday in the tribal region that borders Afghanistan.
A second strike hit the village of Matches but did not wound anyone, the sources said.
Staffers with the NATO press office and the U.S. military in Afghanistan declined to comment on the strikes. The U.S. Embassy in Islamabad also had no comment.
The United States, which has a presence in Afghanistan, is the only country operating in the region with the known capability to launch missiles from remote-controlled drones.
The U.S. maintains that Taliban and al Qaeda forces operate with relative impunity in tribal areas along Pakistan's mountainous border with Afghanistan. The U.S. accuses extremists of using the area as a staging ground to attack U.S. forces and their allies in Afghanistan.
here have been several reports recently of suspected U.S. missile attacks on militant targets in Pakistan.
Media reports have said that several months ago, President Bush authorized U.S. special forces to carry out ground assaults inside Pakistan without seeking Islamabad's permission.
U.S. attacks in Pakistan have infuriated Islamabad, which says such raids violate the nation's sovereignty.
President Asif Ali Zardari said last month that Pakistan would not allow foreign forces to enter his nation without permission, even to pursue extremists.
"We will not tolerate the violation of our sovereignty and territorial integrity by any power in the name of combating terrorism," he said in his first speech to Parliament as president.
His remark followed a similar declaration from Pakistan's military chief, Gen. Parvez Kayani, who said that Pakistan's territorial integrity "will be defended at all cost, and no external force is allowed to conduct operations."