The kidnapped son of murdered Palestinian ex-security chief Moussa Arafat has been freed by militants.Manhal Arafat met Mahmoud Abbas on his release. There was no immediate comment from the Palestinian president on how his liberation had been obtained although sources suggest it followed the intervention of mediators from the ruling Fatah movement. Manhal Arafat returned to his dead father’s home, two days after the fatalshooting in Gaza. A spokesman saying he represented the militant group, the Popular Resistance Committees, reaffirmed responsibility for the killing and kidnapping. He spoke out after leaders of the group distanced themselves from Wednesday’s attack. Widely accused of corruption, Moussa Arafat had collaborated with Israel, according to the masked man. He claimed the cousin of the late Palestinian leader Yasser Arafat had helped Israeli forces track and kill at least two Palestinian militants.