CASPER, WYO. — A 5-year-old girl and a 22-year-old man died after a Christmas Eve skiing collision at a ski area outside Casper, and the girl’s mother was injured, authorities said.

The man was snowboarding at the Hogadon Ski Area when he collided with the mother and daughter, who were on skis and had stopped on a ski run, Natrona County sheriff’s Lt. Mark Sellers said Saturday.

No names were released. All were from Casper, Sellers said.

The man and the girl were pronounced dead at the Wyoming Medical Center in Casper.

The mother remained hospitalized Saturday but her condition and the nature of her injuries weren’t known. A telephone message left with a hospital spokeswoman wasn’t immediately returned.

The collision was first reported by the Casper Star-Tribune. Sellers said it occurred at about 2:30 p.m. Friday on the Dreadnaught run, which is rated difficult. The weather was clear, he said.

The circumstances of the collision are under investigation, he said.

The ski area was closed Saturday for Christmas and a telephone message wasn’t immediately returned.