At least seven people were killed in a U.S. drone strike launched Sunday morning in Pakistan' s northwest tribal area, reported local media.

According to the report, the U.S. drone fired two missiles at a house in the Shoh area of North Waziristan, a tribal area bordering Afghanistan, which is believed to be a stronghold of militants in Pakistan.

Details about the killed are not immediately available.

Most of the people targeted by the U.S. drones are militants, but the U.S. drones do sometimes mistakenly kill innocent civilians. There are reports saying 30 percent of the people killed in the U.S. drone attacks are civilians including children and women.

Sunday's strike is the sixth of its kind since October. Over the last ten days, the U.S. drones have stepped up their strikes at the hideouts of militants in the country's northwest tribal area, killing at least 45 people including eight German nationals who were believed to be trained at the militant's camp in the deep mountain area for terror attacks abroad.