The widow of Palestinian leader Yasser Arafat says her late husband was poisoned with radioactive polonium.

Suha Arafat's allegations come after receiving the results of Swiss forensic tests on the leader's corpse.

The team of experts opened Arafat's grave in the West Bank city of Ramallah last November.

Their investigation was prompted by an Al Jazeera television investigation that reported traces of polonium-210 on his personal effects when he died in 2004.

Suha has not accused any country or person, saying the leader of the Palestinian Liberation Organization had many enemies.

Arafat led the PLO to a peace agreement with Israel in 1993 before further peace talks failed several years later.

French pathologists on the team have not reported their conclusions publicly.

But a British forensic scientist independently retained by Al Jazeera to interpret the results says the Swiss tests' findings confirmed the presence of polonium.

At the time, the cause of death was stroke, but no autopsy had been performed.