Two hikers in Utah’s famed Arches National Park were killed when they fell near its famous tourist attraction, Delicate Arch.

The Grand County Sheriff’s Office said the hikers, a 60-year-old woman and a 65-year-old man, plunged into the lower bowl area below the arch at about 7:30 a.m. Friday. A 30-year-old man was also injured and airlifted to the hospital.

The hikers were from California and may be related, according to the Sheriff’s Office, which released a photo of the rescue helicopter sitting in the snow-covered landscape.

The trail to Delicate Arch was closed for a few hours afterwards, and when it reopened, the park tweeted, “Winter conditions make for slippery hiking; proceed with caution.”

The deaths were the first on the trail in years that were not linked to medical issues, the Salt Lake Tribune reported.