Watch: How Bhola violence erupted
At 9.25 minute of the video, it is seen that police officers come out of the room and then the clash erupted

A 14-minute video on Sunday's fierce clash in Bhola's Borhanuddin has been circulated on social network Facebook after the incident.
Rapid Action Battalion's Assistant Director Mahfoz Hossain posted the video yesterday on his Facebook account, saying: "Watch the video and then decide why police fired in defence."
"It is sad that a few died in the shooting. But can you imagine what would happen to them if they had not opened fire?" he said in his post.
In the video, it can be seen that police high-ups and officials took shelter in a room on the first floor of a madrasa adjacent to the Eidgah after hundreds of local people attacked them with bricks and sticks when the law enforcers tried to calm them down.
Later, the local people tried to break into the room. At 9.25 minute of the video, it is seen that police officers come out of the room and then the clash erupted. A few gunshots are heard. An injured police officer is seen lying on the ground.
Bhola Police Superintendent Sarkar Muhammad Kawsar said the police fired in defence. Four people sustained injuries and three of them died at the hospital.
On Sunday, four people were killed and hundreds were injured in Borhanuddin upazila in clashes between police and local people demonstrating for punishment of a youth who, they claimed, had hurt their religious sentiment by a Facebook post.