Dhaka, April 12 -- Police in Kushtia have said the circulation of an old video on social media helped intensify tensions ahead of the killing of self-styled "Sufi shrine leader" Shamim Reza, who was beaten and hacked to death at his shrine in Daulatpur.

On Sunday, Superintendent of Police Mohammad Jasim Uddin said the resurfaced video played a key role in inflaming the situation before the attack.

"Police were present at the scene and attempted to rescue Shamim," he said.

"But the attackers were far more numerous than the police personnel, and the situation quickly went out of control. We are working to identify those involved in the killing inside his residence," he added.

On Saturday afternoon, hundreds of people stormed the "Shamim...