Swiss scientists who conducted tests on samples taken from Yasser Arafat's body have found at least 18 times the normal levels of radioactive polonium in his remains, Aljazeera reported.
The scientists said that they were confident up to an 83 percent level that the late Palestinian leader was poisoned with it, which they said "moderately supports" polonium as the cause of his death.
A 108-page report by the University Centre of Legal Medicine in Lausanne, which was obtained exclusively by Al Jazeera, found unnaturally high levels of polonium in Arafat's ribs and pelvis, and in soil stained with his decaying organs.
The Swiss scientists, along with French and Russian teams, obtained the samples last November after his body was exhumed from a mausoleum in Ramallah in the occupied West Bank.
Dave Barclay, a renowned UK forensic scientist and retired detective, told Al Jazeera that with these results he was wholly convinced that Arafat was murdered.
"Yasser Arafat died of polonium poisoning," he said. "We found the smoking gun that caused his death. What we don't know is who's holding the gun at the time."
"The level of polonium in Yasser Arafat's rib...is about 900 milibecquerels," Barclay said. "That is either 18 or 36 times the average, depending on the literature."
Suha Arafat, the late Palestinian leader's widow, received a copy of the report in Paris on Tuesday. "When they came with the results, I'm mourning Yasser again," she said. "It's like you just told me he died."
The Swiss report only examined the question of what killed Arafat. It did not address the question of whether he was deliberately poisoned or how.