SAN FRANCISCO (CBS SF) — San Francisco fire rescue swimmers, braving rocks and pounding surf, pulled a trapped man to safety early Wednesday morning in the waters off the Presidio in a dramatic rescue captured on video.

San Francisco Fire PIO Jonathan Baxter said a 911 call came in at around 1:30 a.m. of as many as four people trapped on the rocks below a cliff in the waters off Crosby Battery in San Francisco Presidio.

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Hikers told 911 operators they were hearing someone yelling for help from a cliff along the shore.

Emergency and water rescue teams, U.S. Park Police and a Coast Guard helicopter were dispatched to the scene and using thermal technology located a man clinging to the cliffs being pounded by the heavy surf.

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Baxter said the confusion how many people were trapped was the result of people on the beach calling out to him.

“There were some individuals…3-4 individuals who all made 911 calls and were calling out to the (trapped) individual,” he said.

Rescue swimmers were dispatched and able to pull the individual to a rescue boat with paramedics aboard around 5:15 a.m. The individual’s condition was not immediately known.

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He was taken to the hospital for treatment of his undisclosed injuries.