Secretary of State Hillary Clinton released a statement on Tuesday saying that, "The United States condemns in the strongest terms the assassination in Kabul of Professor Rabbani, the former President of Afghanistan and head of the High Peace Council. We extend our condolences to his family, and to all the people of Afghanistan, including those who were injured, and the families of those who lost their lives."
A Taliban suicide bomber on Tuesday killed Rabbani, head of a council that was trying to negotiate a political end to the war, in what analysts called a blow to peace efforts.
Taliban spokesman Zabihullah Mujahid claimed responsibility, saying the killer had gone to Rabbani's home for talks.
The Taliban said it had won assassinated former Afghan president Burhanuddin Rabbani's trust by using a high-level team that feigned interest in talks but instead was intent on killing him.