The Police Bureau of Investigation (PBI) has detained the prime accused in connection with the attack on Hindu homes at Noagaon village in Sunamganj's Shalla upazila.
A team of PBI conducted a drive at Kulaura of Moulvibazar early Saturday and apprehended Shahidul Islam alias Wadhin, union parishad member, confirmed Sylhet Superintendent of Police at PBI Khaled Uz Zaman.
The law enforcers have arrested 30 people so far in their raids, said Shalla police station Officer-in-Charge (OC) Nazmul Haque.
Meanwhile, two separate cases were filed on Thursday accusing hundreds of people in connection with the attack by Hefazat-e-Islam supporters.
One of the cases was lodged by the police, accusing some 1,500 unnamed people, and the other by Habibpur Union Parishad Chairman Vivekananda Majumder against 70-80 named and around 1,500 unnamed persons.
