The three found dead in the militant hideout in Moulvibazar's Borohat were killed by suicide blasts, doctors said after carrying out autopsy on Sunday.
The autopsy was conducted in the afternoon at Moulvibazar Sadar Hospital by a team of doctors led by Resident Medical Officer Dr Palash, said Civil Surgeon Dr Satyakam Chakrabarty.
A three-member team of experts carried out the autopsy at the hospital, Dr Partha Sarathi Dutta Kanungo, coordinator of the hospital told the Daily Observer, "The bodies were disintegrated and in decomposed state. Presumably, they died two days before being brought to the morgue.
The men were found to be in their late thirties and early forties, while the woman was about 30-year-old, said Dr Chakrabarty.
The investigation found no bullet wounds on the bodies. The report suggested bomb explosions led to their death, the surgeon said.
"A number of small pieces of thick wires and metallic objects were found inside the body parts," Dr Kanungo said.
Police have identified one of the three militants, who had blown themselves up along with four children during "Operation Hit Back" at Nasirpur hideout in Moulvibazar. Seven tattered bodies were found after the operation on March 30
The militant Lokman Hossain alias Sohel Rana, hailed from Ghoraghat in Dinajpur, was Shura member of Jama'atul Mujahideen Bangladesh (JMB). He later joined Neo-JMB, police said on Sunday.
Israel Hossain Office-in-Charge of Ghoraghat Police Station said "Lokman had been missing since 2007."
"He was wanted in a case filed under Anti-Terrorism Act in 2008 with Shibganj Police Station of Chapainawabganj," the OC added.
Since March 16, Dhaka Metropolitan Police's Counter Terrorism and Transnational Crime Unit has conducted four anti-militancy drives - Operations Assault 16, Twilight, Hit Back and Maximus - in Chittagong, Sylhet and Moulvibazar respectively. At least 15 militants including child and women were killed during the four anti-militant raids.
At least seven persons including RAB Intelligence Wing chief Lt Col Abul Kalam Azad and two other law enforcing members were killed and several others wounded in two bomb blasts near the Atiya Mahal, a militant den.
