Iran's Foreign Ministry has summoned the Belgian Ambassador to Tehran over the mysterious death of an Iranian national in a Belgian prison.

"The Islamic Republic condemns the killing of Mr. Mamiani-Asl in the Leuven prison and demands an explanation," said the Director of Iranian Affairs at the Foreign Ministry in a meeting with Belgian Ambassador Philippe Colyn.

According to a recent report by Radio Netherlands, an Iranian inmate was killed by a group of prison wardens at midnight on Friday.

Colyn expressed his deepest regret over the incident and promised to relay the Iranian government's concern to the Belgian authorities.

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