CHATTANOOGA (WRCB) - Authorities says they have recovered the body of a boater who went missing after a barge slammed into his small fishing boat on Chickamauga Lake on Saturday.

The Hamilton County EMS says the body of Ricky Wilkey was recovered around 8:00 a.m. about three quarters of a mile downstream from where his fishing boat collided with a barge.

Investigators still aren't sure what caused a deadly boating accident this weekend. A nine-link barge slammed into a small fishing boat Saturday night.

Three men were on board. One was saved, another was killed, and Wilkey went missing.

Officials have detained the barge. TWRA and the Coast Guard are breaking apart the nine links checking for debris from the fishing boat that might be stuck between or underneath.

John Hoesli with the U.S. Coast Guard says they've also interviewed the men who were operating the barge Saturday night, even asking them to submit drug and alcohol tests. "They did not see a fishing boat out there. They didn't know where the fishing boat was," Hoesli told Eyewitness News in an interview on Monday.