Two Border Patrol agents were on duty when their vehicle rolled over in Arizona, killing one of them and injuring another.
The Arizona Daily Star reports that tread separation contributed to the accident at 7:40 a.m. Wednesday on Interstate 10 about eight miles east of Benson.
The agents were rushed to the University of Arizona Medical Center.
One of the agents, who worked for Border Patrol for five years, died en route.
Details were still unclear Thursday morning.