(CNN) A visitor to Hawaii Volcanoes National Park climbed past the metal railing, lost his footing and fell into the Kilauea volcano caldera, according to Ben Hayes, spokesperson with the National Park Service.

Hayes said on Wednesday evening, authorities got a call that a man had fallen into the caldera -- the crater formed by previous volcanic activity. He was with a group, which is why the call came in instantly.

"He had crossed over a metal railing to get closer to the cliff edge where he lost his footing and fell in," Hayes said. "Park officials immediately launched a search and rescue operation with the Hawaii County Fire Department and around 9 p.m. local time search and rescue located the man. He was seriously injured, perched on a narrow ledge 70 feet from the cliff edge."

Kilauea volcano crater, Hawaii Volcanoes National Park, Big Island of Hawaii

Hayes stressed, "visitors should never cross safety barriers, especially near the caldera's ridge. It's still a very dynamic area following last year's activity ."

Officials began a rescue operation, including the use of a rope system to extract the man from the ledge. He was rescued in about an hour, Hayes said.

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