Dhaka, May 18 -- Dhaka University students on Sunday besieged Shahbagh police station again, protesting the killing of their fellow student and Jatiyatabadi Chhatra Dal (JCD) leader Shahriar Alam Shammo and demanding the arrest of his killers.

The demonstrators said they had given a 48-hour ultimatum to the law enforcers on Friday to arrest the prime accused but no one was arrested.

Earlier, on Friday, the students had besieged the police station for nearly an hour and a half demanding immediate arrests.

They called off the protest after issuing the ultimatum.

On Sunday, following a rally at the base of the Raju Bhaskarjya, the students brought out a procession and marched towards Shahbagh police station where they staged another demo...