US missile kills al Qaeda chief in Pakistan We're not sure. We cannot give confirmation just like that," one of them told AFP on condition of anonymity. Four militants were reported killed in the pre-dawn drone strike, which targeted a compound in Miranshah, the main town of North Waziristan. The senior Pakistani intelligence official described Mansoor as the "de facto leader of al Qaeda in Pakistan" after his predecessor, Ilyas Kashmiri, was reported killed in a drone strike last June. Unlike Kashmiri, who had a $5 million bounty on his head, Mansoor is not listed on the US State Department Rewards for Justice list. There was no immediate confirmation of his death from the United States. But one Western counter-terrorism expert described Mansoor as the local chief of al Qaeda and one of the Americans' chief targets in Pakistan. "If it's true, this is very good news for the anti-terrorism fight, and this was very important for both the US and Pakistan," the official said. He called Mansoor Al-Qaeda's go-between with Pakistan's umbrella Taliban movement and a member of al Qaeda's leadership shura in Pakistan. Officials said Mansoor was responsible for attacks in Karachi and on the minority Ahmadi community that killed nearly 100 people in the eastern city of Lahore in May 2010. Ahmadis, considered a sect of Islam, are subject to severe discrimination in Pakistan, which declared them non-Muslims in 1974. Aged about 40 and from Dera Ghazi Khan in Punjab province, he moved to Miranshah several years ago to set up his own training camp. "Western officials believed he was involved in sending fighters to Afghanistan," the senior Pakistani official told AFP.