The Arizona Department of Public Safety is investigating a fatal crash on northbound Interstate 19 that occurred at 9:41 a.m.  Tuesday.

A DPS spokesman said preliminary information indicated a tire came off a tractor-trailer and struck a sedan in the northbound lane. He said the driver of the sedan died. There were no other injuries.

The northbound lane remains closed for the investigation. Vehicles going north on I-19 can use Nogales Highway as a detour.