TEMPE, AZ — The Department of Public Safety is investigating in Tempe near U.S. and Mill Avenue.
It started around 4:00 Sunday morning after troopers stopped a vehicle.
Officers with the Tempe Police Department were also called out to assist.
According to DPS, troopers were investigating a possible impaired driver and say the driver was taken to a hospital for medical evaluation.
No further details from DPS have been provided.
An ABC15 crew at the scene captured video showing guns drawn and the use of possible flash bangs, pepper balls and a K9 unit.
The name of the driver or his current condition remains unknown.