PARIS, (AP) — A judicial official has told the Sipa news agency that French prosecutors have opened a murder investigation into the death of Palestinian leader Yasser Arafat.

Suha Arafat filed a legal complaint in France after Arab satellite TV channel Al-Jazeera broadcast the results of an investigation into her husband’s death. That included tests of objects that Suha said belonged to him.

A Swiss institute detected elevated traces of polonium-210 — a rare and highly lethal substance — on the belongings, but said the findings were inconclusive.

The official said on condition of anonymity because of office rules that a judge will be named to investigate.

Arafat died in a French military hospital in 2004 of what doctors called a stroke.

Longstanding rumors in the Arab world have said he was poisoned.