Of course the Israelies have said that he's been dead, hooked up to life support for a number of days now. See previous posts.
From Yahoo! News - Arafat Is Dead, Palestinian Sources Say:
"'He is dead,' a senior political source close to Arafat told Reuters in Paris, where the 75-year-old leader has been lying in a coma at a French military hospital.
Asked to confirm Arafat's death, another official close to the president said: 'Yes, he is dead. There will be an announcement soon.'
None of the sources gave any details of the cause of death.
Officials in the West Bank said they had not been informed that Arafat was dead. "