It's been eight years when the Palestinian Authority leader Yasser Arafat died in a hospital in France. An investigation is launched this year to find actual cause of his death.

As reported by a Swiss newspaper, 60 samples have been collected from his grave with a Palestinian pathologist only being allowed to touch his remains. It was opened on Tuesday in the West Bank City of Ramallah.

The samples are distributed among three different teams who will investigate them separately. The investigation will take three to four months in total. The probe into the death was taken up after the widow of Arafat, Suha requested for the same.

A Russian team appointed by Palestinian authority and a French team are carrying out the research into the same. The probe is being conducted to investigate if the leader was poisoned by polonium. Tawfiq Tirawi, head of the Palestinian investigation into Arafat's death said that if any proof is found about the poisoning of Arafat, he will launch petition in the International Criminal Court in The Hague seeking the justice.

Earlier, Alexander Litvinenko, a Russian ex-spy was killed by polonium poisoning in London in 2006. "We have evidence that President Arafat was assassinated. And we will continue with our investigation until we get all the relevant details", added Tirwari.