The incident took place at Bandhwar village as five boys were taking bath in Gandak river when all of them fell in the deep water and shouted for help, Sadar DSP Rajesh Kumar said.
While local divers rescued two of them, as many others met watery grave even as another boy was feared dead, he said.
Two bodies belonging to Harishankar Kumar (17) and Sonu Kumar (16) were fished out and sent for post-mortem as efforts were on to recover the body of aother 16 year-old boy, he said.