This is believed to the latest in a spate of targeted attacks purportedly by Jamaat-e-Islami which apparently has gained a free hand in recent days.
Bulbul, a freedom fighter, had testified against former Jamaat-e-Islami chief Ghulam Azam on Oct 5 last year as the 14th prosecution witness at the International Crimes Tribunal -1.
Officer-in-Charge of Khilkhet Police Station Shamim Hossain told bdnews24.com that the body was retrieved from the eastern side of the Khilkhet-Kuril Flyover around 1am.
When reached by phone, Bulbul said: “The dead body is of my brother Ahmed Miraz. I cannot say anything more at this moment. Please pray for me.”

Sub-Inspector Golam Faruk said the victim was not run over by train and that foam came out of his mouth leading them to primarily believe that it was a homicide case.
'Covert killings'
The new generation protest, which has spread like wildfire and been replicated across the nation, has been calling for maximum penalty of death for convicted war crimes and a ban on the Jamaat itself alongwith nationalisation of the organisations tied to it.
Bulbul had told Bangladesh’s first war crimes tribunal that before his very eyes the Pakistani army took away police officer Shiru Mia and his son Kamal along with 36 others from Brahmanbaria jail for killing. He said he had later heard that all 38 had been killed at Koiratola on that November night, which was the night of Eid-ul-Fitr in 1971.
Only on Friday, Tanvir Mohammad Twaki, 17, son of Rafiur Rabbi, the convener of the Narayanganj replica of Shahbagh’s ‘Ganajagaran Mancha’, was found dead on the Shitalakkhya River there, two days after he had gone missing.
Family members suspect that Twaki was killed by Jamaat-e-Islami and its student front Islami Chhatra Shibir in a covert mission.
The dead body of Wahidul Alam Junu, who had deposed on Feb 12 as the 19th witness against Salauddin Quader Chowdhury, was delivered at a Chittagong hospital on Feb 22.
On Friday afternoon, four homemade bombs exploded near the Ganajagaran Mancha, the epicentre of the anti-Jamaat protest, leaving a senior security official injured.
Hours before, on Thursday night, unknown miscreants stabbed Saniur Rahman, a blogger favouring the Shahbagh movement, in the city's Pallabi.
On Feb 15 night, another blogger and Shahbagh civil uprising activist Ahmed Rajib Haider was murdered in front of the gate of his house at Palash Nagar in Pallabi.
Rajib’s friends and family say he was murdered by assailants tied to Jamaat and Shibir.
Detectives on Mar 2 arrested the five students of North South University for their alleged involvement in the killing. Two machetes, four knives, one bicycle, one pair of shoes, seven cellphones and a school bag were recovered from them.
Two of them admitted to police that they were directly engaged in the murder, while three others assisted them. They also admitted that a Shibir activist orchestrated the killing of blogger Rajib.
The Jamaat and Shibir faithful have unleashed a wave of deadly violence after the International Crimes Tribunal-2 on Feb 28 handed down death sentence on party number two Delwar Hossain Sayedee for war crimes.
According to media reports, over 80 people were killed in the past 10 days as Jamaat members clashed with police and rival groups in protest against the verdict.