Sylhet Reporter:Special Weapons and Tactics (SWAT) team has begun operation at the suspected militants den in the house of Achhia Mahal under Shibbari area of South Surma upazila in Sylhet on Friday evening.
Earlier at 3:50 pm, the SWAT team arrived at the house from Dhaka.
On the other hand, police are suspecting that the militants can make armed resistance during the operation.
The law enforcers have fenced off the house from 4:00am on Friday.
Huge police and Rab members led by police commissioner Golam Kibria, have been deployed around the building.
Sensing presence of the law enforcers, the militants were chanting slogans like Allahu Akbar and hurled grenade from the house around 8:00am, said police.
All residents of the neighbouring building beside Atia Mahal have been evacuated. But residents of the building could not be removed as militants are staying in ground floor.
Later, 30 to 40 residents of the building were removed safely around 9:00am.