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.
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