The incident took place at Rongabononi area of Tingkhong.
According to reports, the three boys hailed from the same family.
The deceased boys have been identified as Kulin Hemrom (17), Pulin Hemrom (22) and Tuku Hemrom (12). All three are the sons of Kiran Hemrom and Anita Hemrom.
Meanwhile, the police with the help of locals are conducting a search operation to fish out the bodies.
While, Kulin and Pulin’s body have been rescued, Tuku’s body is yet to be rescued.