The chairman of the Afghan High Peace Council and former Afghan President, Burhanuddin Rabbani, has been killed in a bomb attack at his home in Kabul. Officials said he was meeting two members of the Taliban at his home at the time of the blast. It is unclear if they were involved in the attack. Unconfirmed reports said he may have been killed by a suicide attacker. The High Peace Council leads Afghan efforts to negotiate with the Taliban. Mr. Rabbani is a former president of Afghanistan and also led the main political opposition in the country.