Yasser Arafat’s widow on Tuesday questioned the findings of French scientists that the Palestinian leader did not die from radioactive polonium poisoning but rather from natural causes.

The conclusion, leaked to multiple French media agencies and Reuters, contradicts the findings of Swiss forensic scientists who concluded last month that samples taken from Arafat’s exhumed body were consistent with polonium-210 exposure but did not definitely prove that he was poisoned.

“I’m convinced there is something wrong, and he did not die from a natural death,” Suha Arafat said at a news conference in Paris.

She said she is requesting that the Swiss findings be made available to French authorities investigating her husband’s death. She said the medical experts in Switzerland and France came from different medical fields.