The comments came after Swiss scientists concluded Arafat had probably died from polonium poisoning, prompting Palestinian officials to call for an international inquiry into his "killing".
"Ariel Sharon insisted that everything be done to ensure that Arafat, who was at the time living inside his besieged Muqataa compound, was not killed by our soldiers," Raanan Gissin told AFP, in reference to a 2002-2004 Israeli siege of the president's Ramallah headquarters.
"His instructions were to take every precaution to avoid Israel being accused of Arafat's death," said Gissin, who served as Sharon's spokesman.
A Palestinian official today suggested "a state" was responsible for Arafat's alleged poisoning, in an indirect reference to Israel.
Test results on Arafat's remains "proved Arafat was poisoned by polonium, and this substance is owned by states, not people, meaning that the crime was committed by a state," said Wasel Abu Yusef, a member of the Palestine Liberation Organisation's executive committee.
"Just as a committee was formed to investigate the killing of (slain Lebanese prime minister) Rafiq Hariri, there must be an international committee to investigate the killing of president Arafat," he told AFP.
