Investigators are waiting on DNA tests to positively identify the man found dead Sunday morning in the Vermilion River, authorities said on Monday.

Although a preliminary autopsy report for the man was still pending, law enforcement is not investigating the death as a homicide, Chief Investigator Keith Talamo, with the Lafayette Parish Coroner’s Office, said.

No obvious physical signs of how the man died were apparent on his body, Lafayette Parish Sheriff’s Office spokesman Capt. John Babin said.

A boater discovered the man’s body around 8:45 a.m. Sunday in a hook of the Vermilion River near the 1400 block of East Bayou Parkway, according to the Sheriff’s Office.