Two other boys accompanying the victim identified as P. Ashok (19) were, however, rescued by fishermen who rushed to their aide after they raised an alarm, they said.
Koduru Police Station Sub-Inspector Satyanarayana Murthy said three students, who belong to Chilakalapudi of Machilipatnam town, ventured into the river to take a bath. However, Ashok was swept away by strong current, he said.
His body was fished out later, police said.