An Interstate 17 on-ramp and southbound lanes were closed Wednesday evening near Deer Valley Road and 27th Avenue in north Phoenix after detectives with the Arizona Department of Public Safety found a "suspicious device" in a stolen car.
As of 8:32 p.m., all lanes were reopened, according to DPS and the Arizona Department of Transportation on Twitter.
According to DPS, detectives tracked the stolen car to a nearby motel, and the suspect, identified as 36-year-old Timothy Carpenter, fled. Carpenter popped two tires when leaving, and officers chased him on foot before arresting him.
When detectives searched the car just after 4 p.m., they found a "suspicious device," later identified as "military munition," and closed off the area to investigate.
According to the department, its Explosives and Ordnance Disposal Unit responded to the scene, and determined the device to be inactive military-grade ammunition.
The department said Carpenter was arrested on suspicion of theft of means of transportation and three other warrants for his arrest.
Close to 7 p.m., the department said all lanes headed south on I-17 in the area, as well as the on-ramp from Yorkshire Drive, would be closed as it investigated.
The investigation is ongoing, and no further information was available as of Monday, Dec. 6
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This article originally appeared on Arizona Republic: 'Suspicious device' forces closures on I-17 in north Phoenix