UPDATE: A multi-vehicle accident shut down highway 27 northbound Thursday morning.
Chattanooga police say a 16-year-old driver lost control of her car and spun out on the highway at 8 am.
Another driver saw the crash happen and stopped to help. The 16-year-old driver and her 12-year-old passenger were standing outside their car when another driver hydroplaned, and crashed into the second car and the teens, pinning them under the car.
They are in serious condition.The second driver also was hurt, but is expected to be okay. The third driver wasn't seriously hurt.
Serious crash on I-27 N at Signal Mountain RD., drivers starting to get off at Dayton BLVD. exit where water is pooling from rain. @WRCBpic.twitter.com/hEiyurso3f