Rescue teams returned to the Chattahoochee River in Roswell Wednesday to search for a man last seen swimming Tuesday afternoon.

The man, whose name was released, was last seen around 4:30 p.m. Tuesday, swimming from a boat in the area of Don White Park on Riverside Road, Roswell police said.

Investigators believe the man was attempting to go from one boat to another, but instead ended up in the water. Boaters attempted unsuccessfully to throw a life vest to the man, according to police.

Crews searched until dark Tuesday, and the Forsyth County dive team, along with state Department of Natural Resources, National Park Service and Roswell fire personnel resumed looking for the man Wednesday morning.

“The last known location where he was seen struggling was under the river bridge,” Roswell Deputy Fire Marshal Paul Piccirilli said Wednesday.

“We will begin where he was last seen, then, based on the water current and water levels, they will determine which direction to go from there,” Piccirilli told The Atlanta Journal-Constitution. “We will stay out here until we find him or other information becomes available that we don’t need to do that any longer.”

Staff writer Mike Morris and photographer John Spink contributed to this article.