A group of glacier explorers swiftly exited an ice cave after they heard a loud cracking noise.

Mary Zenger filmed as her group travelled inside the Mendenhall Glacier, Alaska, and entered a cave buried under 130 feet of ice.

She said: "The ice caves appear and change day by day as the ice shifts. After a week of bitter cold, the ice caves were considered safe enough to enter."

The group began to panic as they heard a loud crack reverberate around the icy cave.

This footage was filmed on February 15.

'Gripping footage has surfaced from inside the ice caves at Mendenhall Glacier in Juneau, Alaska.

In this clip, Mary Zenger and her friend are exploring the said caves buried under 130 feet of ice. Things get interesting when they hear the sound of ice cracking. This causes the filmer and her friend to swiftly leave the caves.

"The ice caves appear and change day by day as the ice shifts. After a week of bitter cold, the ice caves were considered safe enough to enter," said Mary.

Name: Mary Zenger
Location: Juneau, Alaska, USA'

Mendenhall glacier, Alaska