Brahmanbaria police's Additional SP Iqbal Hossain told the Dhaka Tribune on Friday afternoon that police had collected as many videos of the attack as possible and scrutinised them.
"We have identified around 50 people from the videos and we will soon go into action against them," he said.
A senior district police official seeking anonymity said that police would not spare anyone, no matter how influential, if they were involved in the attack.
There were strict instructions from high up to not be lenient during this drive, the official added.
Locals and victims of the attack have alleged that influential people from Nasirnagar were behind the attacks on the Hindu community that took place on on October 30 in Nasirnagar. At least 10 temples and hundreds of houses of the community were vandalised.
The National Human Rights Commission's fact-finding committee has also named several men saying they are influential locally and were behind the attack.