Overturned tractor trailer shuts down I-270 southbound lanes in Frederick County

An overturned tractor trailer shut down all southbound lanes on I-270 in Frederick County, Maryland, early Tuesday morning, according to police.

The crash happened near MD-80/Exit 26 in Urbana, Maryland, and traffic is being diverted to MD-80.

Officials say to expect extended closures and heavier than normal traffic on nearby alternate routes.

Stay with NBC Washington for more details on this developing story.