The three minors fell into the ditch while playing on side of road in Dahibhasha village under Sakhuwadali panchayat of Thakurganj block of the district, a district officer said.
The unfortunate two - identified as Samir Tudu (06) and Lakhi Murmu (05) - went inside the ditch while half of the upper portion of the third child was out of the wet mud, Block Circle Officer, Thakurganj, Mohammad Ismail said.
People came to their rescue when the third child raised an alarm.
Circle officer said that both the families of the deceased would get ex-gratia payment if they agree to carry out post-mortem of their children.