Jerusalem (CNN)  -- Dubai's police chief said Sunday the secretive Israeli foreign intelligence unit Mossad "needs to be ashamed" after the January killing of a Hamas leader in a Dubai hotel. "I am now 100 percent sure that the Mossad is behind the assassination" of Mahmoud al-Mabhouh, said Lt. Gen. Dahi Khalfan Tamim. "I used to say 99 percent but now I can say 100 percent." Al-Mabhouh, a founding member of Hamas' military wing, was found dead in his Dubai hotel room on January 20. Police believe he was killed the night before, and have identified some 26 suspects in his death.
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NEW: Dubai police chief "100 percent" sure Israeli intel unit is behind Hamas slaying
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Israel says only media reports link it to killing and there's no reason to blame Mossad
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Leading Hamas figure found dead in his Dubai hotel on January 20
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Toxicology report found significant amounts of a drug used to relax muscles
He said al-Mabhouh entered the country under a false name and was not reported as being wanted by @placeholder.