BROOKFIELD, WI (WTAQ) - Two teenagers and two Waukesha County deputies were injured overnight, when the teens’ vehicle drove into a freeway median in Brookfield and hit a parked sheriff’s car.

The impact caused the teens’ vehicle to start on fire. It happened around 2:45 a.m. Thursday on Interstate 94.

Rescuers pulled an 18-year-old St. Francis man and a 17-year-old West Allis boy from the burning wreckage.

The 18-year-old was the driver. He was taken to a Waukesha hospital for treatment of minor injuries. The State Patrol suspects him of driving while drunk.

The 17-year-old was critically hurt, and was flown to Milwaukee’s Froedtert Hospital. Both deputies suffered back and facial injuries. They were treated and released from Froedtert.