West Bank ? Palestinian Prime Minister Ahmed Qureia said Wednesday that the official investigation into Yasser Arafat’s death failed to determine what killed the longtime Palestinian leader.

Arafat died in a French hospital Nov. 11 after his health rapidly declined, and the cause of death has remained a mystery. His wife, Suha, refused an autopsy.

The report, issued by a special ministerial committee that investigated the death, said it was “the result of deep bleeding in the brain.” However, doctors could not determine the initial source of his ailment, the report said.

“French and Palestinian doctors who treated the martyred brother found that medicine could not find the disease which infected Arafat, neither viruses, nor germs, nor AIDS, nor bacteria,” Qureia said.