(UPDATED: 3:00 p.m.) Montgomery County firefighters put out a series of brush fires that began along the right side of northbound I-270 this afternoon and threatened nearby townhomes.

The fires began at about 1 p.m. and stretched almost half a mile from the Beltway and Rockville Pike exits onto I-270 to Old Georgetown Road. At 2:50 p.m, MCFRS officials reported a fire near townhomes on Englishman Drive had been completely put out.

The fires have caused a significant traffic delay as all three lanes of I-270 North and the ramp from Rockville Pike remain closed. Cars are getting by in a single lane of traffic on the right shoulder.

MCFRS officials on the scene requested the fire marshall to help investigate what started the fires. There were no reported auto fires along I-270 at the time the fire started.

There were fires on each side of the Grosvenor Lane overpass. Firefighters requested an ambulance unit as a precaution, but nobody was reported injured.