The body of a 27-year-old man was found floating in a river in Centane, Eastern Cape, on Sunday.
Police spokesperson Capt Jackson Manatha said Zwelethu Njama was reported missing on Saturday.
A search was launched, but police were unable to track him, Manatha said.
A passerby discovered his body floating in a river in Nxaxo village on Sunday at around 7am.
Manatha said he had no visible injuries and his cellphone was found with him.