Adam Tamizi Haque, chairman of Haque Group, was taken to the DB office at Minto Road in the capital on Saturday evening for questioning.
Confirming the matter, DB chief Harun-Or-Rashid said he will brief the media about the matter.
Earlier on November 16, members of Rapid Action Battalion (RAB) raided the house of Tamizi Haque in the city`s Gulshan area.
Adam Tamizi Haque, however, threatened to commit suicide if he is arrested, according to security officials who took part in the raid.
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