Sound of gunshots has reportedly been heard at one of two militant dens which have been cordoned off by law enforcers in Sadar upazila of Narsingdi since last night.
From 11:40am, around 26 rounds of gunshots were fired for four minutes straight at the militant hideout.
Earlier, members of law enforcement agencies started an anti-extremist operation at two houses suspecting those as militant dens in Bhogiratpur and Madhabdi areas in Sadar upazila of Narsingdi on Tuesday morning.
CTTC Chief Monirul Islam said they started the anti-extremist operation around 10:15am with five units of law enforcement agencies this morning.
Earlier, members of Counter Terrorism and Transnational (CTTC) unit of Dhaka Metropolitan Police cordoned off the houses suspecting those as militant dens since on Monday night.
Abul Kalam, officer-in-charge (investigation) of Madhabdi Police Station, said over 100 police surrounded the seven-storey building of Afzal Haji in Gangpar area under Madhabdi municipality and another five-storey building of cloth trader Billah Hossain in Bhogiratpur area around 9 pm Monday.
Two teams of Special Weapons and Tactics (SWAT) and DMP Detective Branch joined the CTTC team at night.
Later, a team of Rapid Action Battalion (Rab) also joined them on Tuesday morning.
"We will begin the operation soon," said CTTC senior assistant superintendent Thunder Khairul Hasan.
CTTC Chief Monirul Islam reached the spot at 9 am Tuesday.
Earlier at night, the district administration imposed section 144 in and around 500-yard areas of both the buildings, said Shah Alam Mia, executive magistrate of Sadar upazila.
Meanwhile, police detained Md Nazmul for allegedly bringing a militant suspect as a tenant of the house in Bhogiratpur.