A case involves 250 people, though 39 have been named, in an attack on Hindu houses in Maloparha, Chapatola village, at the Abhoynagar Upazila in Jessore, Abhoynagar Police Station OC Emdad Hossain said.
Police also detained two Jamaat-e-Islami activists for their suspected involvement.
A temporary police camp had been set up in the area, Assistant Superintendent of Police Reshma Sharmin said.
Miscreants vandalised and looted more than 50 houses of Hindus in Maloparha on Sunday evening.
Police blamed Jamaat and its student wing Islami Chhatra Shibir for the attack.
Local Awami League leader Ranjit Roy, who was unofficially elected from Jessore-4 constituency, alleged that Jamaat activists had carried out the attack at the instigation of his opponent Sheikh Abdul Ohab, a rebel Awami League candidate.
Local BNP leaders alleged police were blaming the 18-party Opposition alliance in order to harass them.
Police on Tuesday detained five people over the attacks on houses and shops of Hindus and Awami League supporters in Kornai village of Dinajpur Sadar Upazila.
The district commission has also formed a three member body to probe the attack with additional district magistrate Abu Raihan as the head, Deputy Commissioner Ahmed Shamim Al Razi told bdnews24.com.
The committee has been asked to submit its report as soon as possible.
Police filed a case accusing 15 named and 200 anonymous people over the Sunday’s incident, Kotwali Police Station OC Altaf Hossain said.
A temporary police camp has also been set up in the village.
The authorities distributed 100 blankets and 350 kgs of rice to the affected families on Monday.
The victims returned to their houses.
The deputy commissioner said the affected people would be given financial help and CI sheets to rebuild their houses and shops.
Over 100 Hindu houses and shops were vandalised and set on fire in Kornai village of Chehelgazi Union of Sadar Upazila for three hours on the night of polling.