French experts have ruled out a theory that Yasser Arafat was killed by poisoning, according to a source close to the investigation into the Palestinian leader’s 2004 death. “The report rules out the poisoning theory and goes in the sense of a natural death,” the source told AFP. The French experts’ findings differ significantly from those of Swiss scientists, who said last month that their research offered some support for the suggestion Arafat was killed by polonium poisoning. …