"They threatened that the streets in Islambagh would be flooded with blood of my two sons-in-law who are handling the case," Rawshan Ara Begum, mother of the murdered, told a press conference at Crime Reporters' Association, Bangladesh in the city yesterday.

More than 50 residents of the locality were also present at the press conference who demanded immediate arrest and punishment of the prime suspect Mohammad Arif and his accomplices and relatives who are now issuing death threats to Ali's family members.

Rawshan Ara urged the caretaker government to ensure safety of her family members and demanded capital punishment of the killers of her son, who was shot dead at Islambagh on the night of Aril 25.

"Almost every night some unidentified men throw brickbats, stones and iron rods to our house while one of Arif's sisters is threatening us openly," she added.

"Police has turned a blind eye to the case. They are yet to arrest Arif, also accused in several murder and arms cases," said Ali's sister Mamtaj.

"They failed to extract any information about the murder although after three other accused in the case were arrested earlier," she added.

Arif, son of one Suruj Miah at Etwalaghat in Islambagh, allegedly shot Mohammad Ali dead nine hours after threatening to kill Ali for refusing to take power connections from the electric transformers he controls.

Arif was earlier arrested from his house with a cache of arms on February 2, 1995, but was released later, police said.