DONALDSONVILLE — The body of a fisherman was found Sunday morning in the Mississippi River and authorities are now searching for the man’s nephew after the two were reported missing during a fishing trip, said Adam Einck, a Louisiana Wildlife and Fisheries spokesman.

Workers on a tugboat found the body of Larry Peters, 58, of Slaughter, in the river near Donaldsonville, Einck said.

Authorities are still looking for Joshua Peters, Larry Peters’ nephew, Einck said. Joshua Peters, of Livingston, is in his late 20s, he said.

The two were on a fishing trip that began in Baton Rouge near the Mississippi River Bridge Saturday afternoon, he said.

The pair were on a 14-foot bateau boat, which is also missing, Einck said.

Multiple agencies are looking for Joshua Peters with search efforts concentrated on the river between Donaldsonville and Baton Rouge, Einck said.

U.S. Coast Guard helicopters and Wildlife and Fisheries boats are being used in the search, Einck said.

Deputies from the Ascension and East Baton Rouge parish sheriff’s offices are also helping with the search, Einck said.

The agencies will search until nightfall, then resume in the morning if they do not find him, Einck said.

Ascension Parish Sheriff’s Chief Deputy Tony Bacala said deputies were notified that Larry Peters’ body had been found around 10:30 a.m. Sunday

The body was turned over to the Ascension Parish Coroner’s Office, Einck said.