It came completely under control on Tuesday afternoon before burning down trees in 1.31 acres of forest land, said Mohammad Belayet Hossain, a divisional forest officer.
The Forest Department and the Fire Service and Civil Defence could not determine the cause behind the fire incident.
Fire trucks could not reach the scene in the dense forest when the fire erupted on Tuesday morning.
The Forest Department initially suspected that the fire might have originated from burning cigarette thrown by fishermen or honey collectors.
About four acres of forest in the Dhansagar area of the Chandpai Range in the eastern part of the Sundarbans were burnt in a fire on Feb 8 this year.
“A lack of water has made our job difficult,” said Belayet.