Detectives arrested Azharul Islam, former organizing secretary of Dhaka Metropolitan Hefazat-e-Islam, on Tuesday morning.
DMP's ADC Media Iftekhairul Islam said he was arrested from Jatrabari area on sabotage charge.
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He was an accused in a violence case over Shapla Chattar incident in 2013, he said.
DB Police said at least 50 Hefazat leaders have so far been arrested on sabotage charges.