A US drone fired two missiles at a compound in a northwestern tribal region bordering Afghanistan on Saturday, killing eight militants, two Pakistani intelligence officials said.
The officials said the strike happened in Datta Khel, a town in North Waziristan, where the Pakistani military has been carrying out a major offensive against militants since last month. They said the identity and nationality of those killed was not immediately known and agents were trying to get details.
The officials spoke on condition of anonymity because they are not authorized to talk to media.
North Waziristan is home to local and foreign militants suspected of attacking American and NATO troops across the border in Afghanistan.
US drone strikes are a serious source of tension between Washington and Islamabad. The Pakistan government denounces the strikes as a violation of the country's sovereignty.
A government spokesman was not immediately available to comment on the latest strike, which was the second this week.
On Wednesday, a US drone killed 15 militants also in North Waziristan. The military launched the offensive in the region against local militants and al-Qaida on June 15, forcing over 800,000 people to move to other towns and cities for safety.
The military says so far it has killed nearly 500 militants, while it has lost 26 soldiers.