They have, however, arrested Manik, a RU employee and Jubo League worker who took Mustafa to Rajshahi Medical College Hospital after he was shot on Friday night.

Manik has been placed on a two-day remand by a magistrate's court.

Earlier, the local BNP-Jamaat leaders blamed 'an alliance of opposition Awami League (AL), leftist parties and outlawed Purba Banglar Communist Party (PBCP)' for the murder.

At a press conference organised jointly by the district and city BNP-Jamat, Rajshahi city mayor and BNP lawmaker Mizanur Rahman Minu said the murder of Mustafa was preplanned and committed by an unholy alliance which is creating anarchy in the country by killing people one after another.

Rajshahi Jamat Ameer Ataur Rahman, district BNP President Azizur Rahman and city BNP President Saleh Uddin Baby were present at the press conference.

Meanwhile, local leaders of AL and 11-party alliance have refuted the allegation saying the opposition parties were blamed for political vengeance.

City AL General Secretary AHM Khairuzzaman Liton said the allegations of the ruling alliance are politically motivated.

Local Workers Party leader Liaquat Ali Liku, Communist Party leader Enamul Haq and Jatiya Samajtantrik Dal leader Abdullahel Shibli, in a joint statement, have also denied the allegations.