Lt. Gen. Dahi Khalfan Tamim told broadcaster Al Arabiya on Tuesday that Canada was the location of the arrest.

He had previously said only that the arrest was in a Western country. Tamim says Canada told Dubai officials not to make the arrest public. Canada’s consul general in Dubai, Kris Panday, said he has no comment. Officials in Canada did not respond to requests for comment.

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.

Tamim said he was frustrated by the lack of any details or information from Canadian authorities regarding the arrest.

“We want clarity on this issue. We want the Canadian authorities to tell us exactly what the details are — the thing that is discomfiting is the lack of transparency on this,” he said. Tamim said he had been informed that Canada would send a representative to Dubai to provide further information, but did not know when a debriefing would take place.

The Canadian arrest would be the second in the case. A suspected Israeli agent was detained in Poland in August and handed over to Germany, which freed him on bail. The man was suspected of fraudulently obtaining a German passport believed to have been used by a member of the hit squad.

Dubai police accused Israel in February of being behind the hit, a claim echoed by some other governments and which was followed by the expulsion of some Israeli diplomats in several countries. Israel, citing an “ambiguity” policy in intelligence activities, has refused to confirm or deny the allegations.