Based on a complaint lodged by the murder accused's elder brother Arif Mohammad, police arrested Asif after exhuming four bodies from a room in their house in Gurutola village on Saturday.
The arrested persons, identified as 19-year-old Sabir Ali and 21-year-old Masum Sheikh of Gurutola village in Kaliachak police station area, claimed that they had kept the firearms in their houses.
The water entered the hospital and mainly affected male medical, female medical, emergency service and operation theatre.
Malda district SP Arnab Ghosh said three persons have been arrested in connection with the lynching but the victim is yet to be identified.
The face value is not a lot, Rs 96,000, but this was the second such catch in the past two weeks.