The suspected militants were shown arrested in an anti-terrorism case
A Sylhet court has placed three accused on a five-day remand in a case filed under the Anti-Terrorism Act.
This resulted from the operation at Atia Mahal, a militant shelter, in Shibbari, Sylhet, in 2017.
Metropolitan Magistrate Mamunur Rashid passed the order on Thursday.
Investigation officer of the case and Police Bureau of Investigation (PBI) Inspector Abdul Hossain produced the suspects before the court seeking remand for them.
Sylhet Metropolitan Police Assistant Commissioner (Prosecution) Amulya Kumar Chowdhury has confirmed the matter to the Dhaka Tribune.
PBI Additional Superintendent of Police Sarwar Jahan said: "We have already started interrogating the suspected militants."
Those remanded are Arzina Begum, 19, sister of suspected militant Marzina who was killed in the operation at the militant den; Arzina's husband Jahurul Haque alias Jasim, 25; and Mohammad Hasan, 26, of Naikkhonchhari.
The trio, now in jail for another case, was shown arrested in the anti-terrorism case on Wednesday.
Previously, on March 25, 2017, seven people were killed during the Army-led operation called "Operation Twilight".
However, police had launched the raid on the militant den during the early hours of March 24, 2017.
Army Para Commandos found the bodies of four militants, including that of a female, at the militant den on March 27.