MILLARD COUNTY, Utah (AP) — Authorities in Utah say three people were killed and a fourth person injured during a rollover accident on a gravel road near the Nevada border. An off-duty Millard County Sheriff’s Office deputy encountered the surviving victim on the side of the road following the Friday afternoon crash in a rural area about 33 miles north of U.S. Highway 50. When emergency responders arrived, a 42-year-old Nevada man and a 45-year-old Salt Lake City woman were found dead. The 67-year-old mother of the surviving victim was still alive when crews responded but later died. Authorities say speed was likely a factor in the crash. The identities of the victims were not immediately released.