Among the arrestees, 197 are Hefajat-e-Islam activists and supporters, 37 BNP and three Jamaat-e-Islami activists.
More than 39,000 people have been made accused in 55 cases filed over the mayhem in Brahmanbaria.
Forty-nine of the total cases have been filed with Brahmanbaria Sadar Model Police Station, three with Ashuganj Police Station, two with Sarail Police Station and one in Akhaura Railway Police Station.
Police have mentioned names of 414 accused in the case statements while the rest remain as unnamed.
When contacted, ASP (crime and administration) Md Roish Uddin told The Daily Star that police are identifying the perpetrators from video footages and still images.
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