**A suicide bomber has killed an influential Afghan tribal chief and 14 other people in eastern Nangarhar province, officials say.**Mohammad Haji Zaman, a powerful mujahideen warlord during the Afghan civil war in the 1990s, had been addressing a gathering of refugees.
He had been living in the north-western Pakistani city of Peshawar and only recently returned to Afghanistan.
No-one has claimed responsibility for the attack.
Correspondents say that Mohammad Haji Zaman - also known as Haji Zaman Gamsurek - played an important role in the war against Taliban and al-Qaeda militants around the Tora Bora mountains at the time of the US-led invasion of Afghanistan in 2001.
The BBC’s Chris Morris in Kabul says that Nangarhar is a province that, under the guidance of local tribal leaders, had become more peaceful in recent months.
But it is on the border with Pakistan, an important target for militants wishing to smuggle arms.