Palestinian officials raised the prospect of exhuming Yasser Arafat's body after a Swiss laboratory said it had discovered an "unexplained" level of the radioactive element polonium on personal belongings of the late President.
The discovery during a nine-month investigation by the Arab satellite channel Al-Jazeera could prove the most plausible evidence yet to fuel long-standing but uncorroborated rumours among many Palestinians that Arafat was poisoned.
The potentially deadly element - the same one blamed for the 2006 death in London of the former Russian spy Alexander Litvinenko - was discovered among personal effects, including clothes and a toothbrush, given to the network by Suha Arafat, the late Palestinian leader's widow.
Suha Arafat, who refused to allow an autopsy when her husband died in a Paris hospital in November 2004, said yesterday that she would be asking for an exhumation, telling Al-Jazeera: "We must go further and exhume Yasser Arafat's body to reveal the truth to the Muslim and Arab world."
And a statement issued by the office of the Palestinian President, Mahmoud Abbas, Arafat's successor, said: "The Palestinian Authority was and remains fully prepared to co-operate and to provide all the facilities needed to reveal the real causes that led to the death of the late President."