Her Press Secretary AKM Shamim Chowdhury told bdnews24.com that the prime minister gave the order to “relevant authorities” soon after the murder on Saturday afternoon.
Unknown assailants attacked the sociology teacher with sharp weapons near the university campus when he was returning home.
With severe injuries on his head and shoulder, Islam was rushed to Rajshahi Medical College and Hospital. But he succumbed to the injuries around 4pm, doctors said.
Police are yet to identify and arrest the killers. The motive behind the killing is also not clear.
Chowdhury said the prime minister strongly condemned the murder.
She offered her condolences to Islam's grief-stricken family members and prayed for the peace of his departed soul.