Kavous Seyed-Emami, an environmental activist and sociology professor, was arrested on Jan. 24 and died in prison, his son wrote on Twitter last week. Iran's judiciary said on Sunday that Seyed-Emami, 63, had committed suicide.
"We are seriously concerned by the situation surrounding the detention and death of Mr. Seyed-Emami," Canada's foreign minister, Chrystia Freeland, said in a statement.
"We expect the Government of Iran to provide information and answers into the circumstances surrounding this tragedy. We will continue to use every means at Canada's disposal to seek further information."