Nkhatabay Police say the deceased in the company of his friends went fishing at the river and while fishing a crocodile suddenly zapped and dragged him into water.
According to police, his friends reported the tragedy to parents and other villagers who launched a marine search and they found the body.
To their shock, they noticed that the beast chopped two legs of the deceased which made some people assume that the beast might be a crocodile.
Police in the district have since sounded a warning to people to avoid fishing or swimming in places infested with crocodiles in a bid to avoid the recurrence of such accidents.
The deceased hailed from Iteta village traditional authority Fukamapiri in Nkhatabay.