Lifeguard crews are continuing their overnight search for a missing swimmer, who submerged under water about 20 yards from the shoreline near Ocean Beach around 2:30 a.m. Sunday, according to a witness.
"We'll be searching throughout the day," said Lt. Greg Buchanan with the San Diego Lifeguards.
Lifeguard crews conducted an extensive search by land, air and sea from about 2:30 a.m. to 4:30 a.m. Sunday. They had assistance from a San Diego Fire Department helicopter and the Coast Guard, which provided a water vessel and helicopter for the search.
Buchanan said two witnesses saw the man on land before his moonlight swim, and one witness saw him dip under the water and never come back up.
"There's a reporting party who thinks they saw it. They seem credible. We believe there's a good chance that what they said they saw actually occurred," Buchanan said.
The missing swimmer is described as being 5 feet 9 inches tall. He is a white male with a dark beard wearing white shorts.
According to witnesses, the man began his swim near the foot of Del Monte in Sunset Cliffs, just south of Ocean Beach.
He was last seen about a quarter of a mile south of the OB pier.