MIRANSHAH (AFP) Missiles from a US drone aircraft killed seven militants at a training compound in North Waziristan on Sunday, officials said. Two missiles slammed into a building near the main town of North Waziristan, a tribal region rife with Taliban, Al-Qaeda-linked fighters and militants from the Haqqani network. Seven militants were killed and four wounded in the drone attack, said a security official who asked not to be named because of the sensitivity of the US strikes, which fuel anti-American sentiment in Pakistan. We have sent our team to assess the situation and get details. Its a remote area and the communications system is bad. Another security official confirmed the casualties and said the dead included 'four foreigners, possibly Uzbeks. A local government official said the targeted compound about 25 kilometres east of North Waziristans main town of Miranshah was used for training insurgents, while a car was also destroyed in the bombing raid. A barrage of US drone strikes hit Pakistans northwest tribal belt in January, most concentrated around Miranshah. On February 2, a swarm of US drones fired a large volley of missiles at an extremist stronghold in North Waziristan, killing at least 16 militants, but there had been a lull in such raids since then. The Pakistan government publicly condemns the strikes saying they violate the nations sovereignty. However, analysts say Islamabad gives tacit approval to its US ally for the raids. More than 780 people have been killed in the US strikes in Pakistan since August 2008, and American officials say they are a vital tool in the battle against militants and have killed a number of high-profile targets. Taliban leader Hakimullah Mehsud has been a prime target of the drone attacks and US and Pakistani officials increasingly believe he was killed in a January strike in the northwest, although the Taliban insist he is alive. Mehsud assumed leadership of the Tehreek-e-Taliban Pakistan (TTP), blamed for the deaths of thousands of people in Pakistan, after his predecessor, Baitullah Mehsud, was killed in a US drone strike in August last year. Washington is pressing Islamabad to tackle militants in the northwest who use Pakistan soil to launch attacks in Afghanistan, where about 113,000 troops under US and NATO command are battling a Taliban-led insurgency.