A car flipped over on northbound Interstate 270 in Gaithersburg, Maryland, Sunday night, critically injuring the driver and blocking traffic, fire officials say.
The car overturned on I-270 at I-370 and all northbound lanes are blocked, Montgomery County Fire and EMS said.
Firefighters had to extricate the driver from the car.
Medics took the driver to a hospital with critical injuries.
Stay with News4 and NBCWashington.com for updates to this developing story.