KABUL, Afghanistan - An Afghan government commission investigating the assassination of the country's former president has accused Pakistan of not cooperating with its investigation, after alleging that Pakistani intelligence officials also had advance knowledge of the plot.

The commission warned Tuesday that it will appeal to the international community to investigate the assassination of Burhanuddin Rabbani if Pakistan does not cooperate.

Pakistan says it is cooperating and denies involvement in the Sept. 20 killing of Rabbani, who was trying to broker peace with the Taliban.

The assassin gained entry to Rabbani's home by claiming to be a peace emissary from the Taliban's governing council in Pakistan. He detonated explosives that were hidden inside his turban, killing Rabbani.