The remains of former Palestinian leader Yasser Arafat are due to be exhumed today as part of an investigation to establish if he was murdered.
Forensic scientists will carry out tests to confirm whether or not he was poisoned after a Swiss institute said it had discovered traces of radioactive polonium on his clothing.
Arafat died in Paris in 2004, a month after being flown, seriously ill, from his headquarters in the West Bank town of Ramallah.
French doctors who treated him in his final days said they could not establish the cause of death and there was no post-mortem.
Israel has denied Palestinian allegations of foul play.
A French court opened a murder inquiry in August after the Swiss scientists revealed their findings.
Al Jazeera's Clayton Swisher, who made the documentary that prompted the decision to test the remains, told ABC News Breakfast: "They found it on his toothbrush in elevated levels.
"They found it also on the sweat-stained collar of his tracksuit.
"Polonium does exist in earth in very low quantities but the kind of polonium they found was reactor-made polonium," he said.
"The kind that only can be made in a nuclear lab, so that should have no business being in there."
Tawfiq al-Tirawi, who is in charge of the Palestinian committee overseeing the investigation, told reporters it was a "painful necessity" to exhume Arafat's body.
He added that Arafat's body would be exhumed from its limestone mausoleum in Ramallah away from the public and media.
Separate samples will be taken by French and Swiss forensic teams, as well as a Russian team of experts, who the Palestinians invited to help with the examination.
The results could take up to several months to be announced.