An unmanned aircraft fired at least two missiles at a vehicle in northwestern Pakistan on Monday, killing five people. The suspected U.S. attack took place about 25 kilometers east of Miranshah, the main town in North Waziristan.
That area near the Afghan border is used by militants as a staging ground for attacks in Afghanistan, and many Taliban and al-Qaida leaders are believed to be living there.
On Sunday a missile attack killed at least six people, believed to militants, near where Monday's attack took place.
U.S. officials rarely comment on missile strikes in Pakistani territory, which are deeply unpopular with the Pakistani public and are opposed by the government in Islamabad.
The missile strikes have become more frequent recently. U.S. officials say they have killed a number of senior Taliban and al-Qaida leaders.
Some information for this report was provided by AP and AFP.