Unknown assailants have stabbed dead a muezzin inside a mosque in Old Dhaka's Islampur area.

The body of Belal Hossain, 55, was found in a pool of blood on the stairs of the mosque. Police say he was killed before 5:00am this morning.

Belal was a muezzin (a man who calls Muslims to prayer) at the Jabbu Khanam Mosque.

Kotwali Police Station Officer-in-Charge Abul Hassan confirmed the murder. He could not state any possible motive of the killing.

The body has been taken to Dhaka Medical College Hospital.