A 13-year-old boy, Nathaniel Ullom from Elizabeth, Colorado, was killed in an RV crash in Yellowstone National Park Tuesday evening.

The boy’s 13-year-old twin brother was seriously injured.

A spokesperson from Yellowstone National Park told K2 Radio that the rented RV crashed on South Entrance Road near Lewis Falls.

The RV was the only vehicle involved in the crash, no other details were released about it at this time.