Dubai's police chief says a suspect in the killing of a Hamas operative in the United Arab Emirates has been arrested in Canada.
Lieutenant General Dahi Khalfan Tamim told Arab media on Tuesday that Canada has asked UAE authorities to keep the arrests secret. He did not name the suspect.
The Associated Press reported federal officials in Canada had no comment on the remarks.
Hamas commander Mahmoud al-Mabhouh was killed January 19 by a hit squad Dubai police believe was sent by Israel's Mossad spy agency.
Dubai's police chief said earlier that an unnamed country has arrested a key suspect.
More than 30 people were allegedly involved in the killing. Many of them were traveling on fake passports.
Dubai police have repeatedly accused Israel's spy agency of involvement. Israel neither confirms nor denies a role in the case.
Mabhouh was a founding member of the Hamas military wing, which has been responsible for hundreds of attacks and suicide bombings against Israel.
Some information for this report was provided by AFP and AP.