Forest department officials arrested seven members of a deer poaching gang from the Sundarbans in Kochikhali Pakhshir Cahr area of Sharankhola upazila in the district early Saturday.
They also seized a trawler and huge quantity of traps used to catch deer.
Mohammad Belayet Hossain, divisional forest officer (DFO) of Sundarbans East Department, said a patrol team arrested them while conducting a regular drive.
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The poachers entered the forest defying the ban, he said.