A religious program of the Ahmadiyya community, known as Salana Jalsa, in Panchagarh town came under fierce attack soon after the Jummah prayers on Friday, prompting the police to fire bullets and charge batons to restore law and order.
At least two people have been killed and around three dozen sustained injuries due to the clashes that continued till night.
Tensions over the Jalsa, an annual gathering of the Ahmadiyya community, have been going on for a long time in the area.
Some Islamic groups in Bangladesh consider Ahmadis, also known as Qadianis, to be non-muslims and want a ban on the sect's activities.
Dhaka TribuneAfter the Friday prayers, Muslim devotees from some mosques gathered in the municipality area and started a protest march.
Then they went to the town staging an agitation there. At one point, they marched towards Jalsa in the Ahmednagar area.
As the police stopped the procession at the Chowrangi intersection, the protesters became angry and started throwing brickbats at the police in the city's Cinema Hall Road area.
The mob also vandalized and looted several houses and shops in Ahmednagar area.
Dhaka TribuneThe police had to move back at one point due to the protest. Meanwhile, the BGB and RAB joined the police to control the situation.
During the clashes, police fired more than 100 rounds of rubber bullets and tear gas shells to disperse the stone-pelting protesters.
At least 30 people, including, journalists covering the violence were injured. One of the attackers died on Friday while an Ahmadi community member succumbed to injuries on Saturday.
At about 8:30pm, the local administration directed the Jalsa organizers to end the program, which was supposed to take place for seven days.
Our Thakurgaon correspondent Zakir Mustafiz Milu contributed to this report