Authorities say two people have died and several others were injured when two people camped at the park’s Camp Woodward in northern California.
The men were found on Thursday morning and taken to a hospital in Sacramento, where they were pronounced dead, authorities said.
The other person who was camping in Camp Woodward died from his injuries at a hospital, according to the Orange County coroner’s office.
A spokesperson for the park confirmed the deaths, saying the two were a man and woman who were in their 20s.
They were found by campers at the Camp Woodward site and the investigation is ongoing.
The park said they were camping in a nearby campground, where the campsite is surrounded by a fence.
Camp Woodward is a national park and one of the country’s largest national parks.