An Arab security prisoner from the Palestinian Authority claims he was recruited by Israel's security services to poison late PLO arch-terrorist Yassir Arafat.
In the tape, and Arab prisoner says Israeli intelligence recruited him to assassinate Arafat for them.
The airing of the alleged tape comes one day after Arafat's widow, Suha, called to exhume her husband's remains from its grace in Ramallah for an autopsy.
It has also alleged Arafat may have died of Leukemia or the AIDS virus.
"In the attempt on me, we had evidence in hand. In the case of Arafat, the Mossad left no trace," Mashaal said, referring to a botched Israeli assassination attempt on him 15 years prior.