KABUL, Afghanistan — A Kabul police official says former Afghan President Burhanuddin Rabbani was killed by a suicide bomber concealing explosives in his turban.

A presidential spokesman says Afghan President Hamid Karzai is cutting short his trip to the United Nations in New York to return to Kabul.

Mohammad Zahir, the chief of criminal investigation for the Kabul police, said the turban bomber entered Rabbani’s house Tuesday evening.