Palestinian officials say Israel is the “only suspect” in the death of leader Yasser Arafat following a Swiss report that said his remains contained high levels of radioactive polonium.
The head of a Palestinian committee set up to investigate Arafat’s 2004 death called it an “assassination”.
He said investigations would continue “to confirm all the details and all elements of the case”.
Israel has repeatedly denied any involvement in Arafat’s death.
Arafat’s widow, Suha, has said she believes the latest report proves he was assassinated. However, she said her late husband had many enemies around the world and she could not directly accuse anyone.
The Palestinian leader died in a military hospital in Paris in 2004 after suddenly being taken ill at his presidential compound in the West Bank city of Ramallah.
“We say that Israel is the prime and only suspect in the case of Yasser Arafat’s assassination, and we will continue to carry out a thorough investigation to find out and confirm all the details and all elements of the case,” Palestinian committee head Tawfik Terawi told a news conference in Ramallah.
It is not clear how the Palestinian investigators believe the poison was administered to Arafat, who was surrounded by guards and a close circle of aides at his compound.