A soldier survives in Kilauea volcano in Hawaii after climbing the metal fence: NPR

A 32-year-old soldier, striving to better see the interior of Kilauea Volcano in Hawaii, was seriously injured after falling from a 300-foot cliff into the crater of the volcano.

According to a park spokesman, the man is passed over a metal railing to get a better point of view. Then the ground beneath him collapsed.

Army officials said it was about a soldier from the Schofield Barracks who was on the Big Island in Hawaii to perform exercises. An eyewitness saw the man fall into the volcano around 18:30 and immediately notified the authorities.

The rescuers were able to push back inside the volcano, where they found the man on a ledge at a height of 10 meters under the ledge. They tied the man to a stretcher and carried him out of the crater, with the help of a military helicopter.

He was flown to Hilo Medical Center in critical condition. Thursday, his condition has been improved to become stable.

"Visitors should never cross security gates, especially around the edges of dangerous and destabilized cliffs," said John Broward, Chief Ranger of Volcanoes National Park of Hawaii, in a statement, according to the New York Times. He warned that crossing safety barriers could result in serious injury or even death.

Matthias Kusch, chief of the county firefighters' battalion of Hawaii, told Hawaii News Now that this man "is doing remarkably well at his fall, only time will tell what injuries he has suffered."

Kilauea Volcano is one of the most active volcanoes in the world. Last year, it broke for months, destroying about 700 homes on the island with lava and ashes.