A 34-year-old man was brutally gored by a bison at Yellowstone National Park on Monday. The incident took place when the man was walking with his family near Giant Geyser at Old Faithful.

Authorities said that the bison charged at the unidentified man from Colorado Springs, Colorado, injuring him severely.

“Family members did not leave the area, and the bull bison continued to charge and gored the male,” according to a press release issued by the park. “The male sustained an injury to his arm and was transported by ambulance to the Eastern Idaho Regional Medical Center.”

It remains unclear if the family got too close to the animal or if it was an unprovoked attack. Yellowstone officials confirmed that the incident remains under investigation. Details about the victim and his condition were not immediately made available.

Yellowstone said that park regulations mandate people stay at least 25 yards away from bison at all times. Bisons are unpredictable animals and can run three times faster than humans.

“This is the second reported incident in 2022 of a visitor getting too close to the animal and the bison responding to the perceived threat by goring the individual,” Yellowstone National Park said.

This is the second such incident this year.

Last month, a 25-year-old woman from Grove City, Ohio, approached a bison within 10 feet near Black Sand Basin, located just north of Old Faithful at Yellowstone. The animal charged at her and brutally gored her. She had to be rushed to a hospital for treatment at the time.

“Yellowstone’s scenic wonders are sure to take your breath away: don’t let them take your life,” warns Yellowstone National Park on its page online for park safety.

“Bison have injured more people in Yellowstone than any other animal,” says the park. “Always stay at least 25 yards (23 m) away from bison.”