The apparent insider attack, which took place in Nangarhar province, occurred after a combined US and Afghan force was returning from a "key-leader engagement," Colonel Sonny Leggett, a spokesman for US forces in Afghanistan, said in a statement.
Taliban is "really committed to peace, but think the obstacle for peace should be removed first," Taliban co-founder and political leader Mullah Abdul Ghani Baradar says in a rare televised appearance at the start of the two-day meeting in Moscow.