Al-Qaeda's number three leader in Afghanistan, Mustafa Abu al-Yazid, has been killed. Islamist websites, quoting a statement from al-Qaeda said, Mr.Yazid, also known as Sheikh Said al-Masri, died along with his wife and three children. US officials say they believe he was killed recently in the tribal areas of Pakistan in an American drone attack. American officials often refer to the Egyptian-born militant as the main conduit to leader Osama Bin Laden. As Al-Qaeda's operational commander in Afghanistan, he is believed to have had a hand in everything from finances to operational planning.