Two separate cases were filed on Thursday over the attack on Hindu houses by Hefajat-e-Islam Bangladesh supporters in Sunamganj's Shalla upazila.
Shalla Police Station Officer-in-Charge Md Nazmul Haque confirmed the matter but declined to disclose the number of accused.
However, sources said, the cases were filed against 700 people.
One case was filed by a victim and another one by the law enforcers, Nazmul said.
Hefajat-e-Islam followers on Wednesday vandalised several Hindu houses in Sunamganj as a Hindu youth had "criticised the party's Joint Secretary General Maulana Mamunul Haque on social media."
Young Hindu man Jhumon from Noagaon village made a Facebook post on Tuesday night. As the post went viral, police detained him with the help of locals on the same night.
