French police were on Wednesday probing whether a man seen in a video released by the Islamic State group purporting to show the execution of an Arab Israeli was close to French jihadis gunman Mohamed Merah. In the video, a youth identifying himself as 19-year-old Mohammed Said Ismail Musallam is shown kneeling in front of a boy who appears to be no more than 12-years-old. A man stands at his side.