KABUL: A Taleban suicide bomber in Kabul killed eight military officers Wednesday in an attack on an air force bus, Afghan officials said, in the latest strike against the national security forces as US troops withdraw.

The blast came the day after presidential election results were delayed in a worsening dispute over alleged fraud that threatens to tip Afghanistan into a prolonged period of uncertainty.

The next president must tackle the Taleban insurgency with declining NATO military assistance, and a political stalemate could wreck Afghan hopes for a smooth handover of power.

Kabul has been relatively peaceful since the election on June 14, though supporters of presidential candidate Abdullah Abdullah have held demonstrations to protest against alleged ballot-box stuffing.

“As a result of a suicide attack this morning on an ANA (Afghan National Army) air force bus in (west) Kabul, eight army officers were martyred and 13 wounded,” Defense Ministry spokesman General Zahir Azimi said in a statement.

“The wounded personnel have been taken to hospital.”