Dubai's police chief said he was 99 percent certain that Israel was involved in the January killing of a Hamas militant at a Dubai luxury hotel, according to an Emirati newspaper on Thursday.

"Our investigations reveal that Mossad is involved in the murder of (Mahmoud) al-Mabhouh. It is 99 percent, if not 100 percent, that Mossad is standing behind the murder," police chief Dahi Khalfan Tamim told The National newspaper.