Rajshahi: Rajshahi University Teachers’ Association (RUTA) on Monday threatened to go on a nonstop strike if the government fails to arrest the killers of professor Rezaul Karim Siddiquee by seven days.

RUTA leaders came up with the ultimatum while addressing a rally in front of the Senate Bhaban at about 11:00am.

They said they will go on the strike from 3 May if their demand is not met by 2 May.

The teachers also decided to put on hold their protest programmes until 2 May.

Earlier, RUTA members formed a human chain at Paris Road and brought out a rally to press for the demand.

Addressing the rally, RUTA president professor Md Shahidullah and its general secretary professor Shah Azam Santanu demanded immediate arrest of the killers.

Later, they submitted a memorandum to RU Vice Chancellor professor Mizanuddin in this regard.

Besides, the teachers and students of the RU English Department brought out a silent procession on the campus over the same issue.

Meanwhile, police in a drive early Monday arrested Khairul, an Islami Chhatra Shibir activist, from Lalitahar area of the city on suspicion of his involvement in the killing of the teacher.

With this, two Shibir men have so far been arrested in connection with the incident.

Professor Rezaul Karim, 58, of the RU English Department, was killed by miscreants in the city's Shalbagan area while he was waiting for a university bus on 23 April.

Victim’s son Sourov Hossain filed a murder case with Boalia Police Station.

The case was transferred to the Detective Branch (DB) of police from Boalia Police Station on Sunday for a thorough investigation.