Canadian police have arrested a suspect in the assassination of a Hamas militant in Dubai but offered Dubai police no information on the matter, the Gulf emirate's police chief said on Tuesday.

Assassins killed Mahmoud al-Mabhouh in his Dubai hotel room in January, a hit widely blamed on Israeli intelligence agents. The large-scale operation involved a ring of suspects who wore disguises and held passports from countries including Britain, France, Germany, and Australia.

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