Muhammed Nasser, one of the Hamas members who some reported (apparently mistakenly) as having been arrested in Syria as a potential collaborator in his assassination, has just muddied the waters a little more.
Nasser is saying that Mabhouh was being tracked by Arab national intelligence agencies who fear the growth of Islamist movements. He says that Mabhouh would complain to him about how they are following him, "haunting him day and night."
The commenters at Firas Press are astonished that a Hamas leader would say anything to deflect the blame towards Israel.
In general, the rumors about Mabhouh are now far outstripping the facts that are being reported in the Arab press.