Maryland State Police said. The collision on northbound I-270, where police responded at about 9:10 a.m., prompted multiple lanes of traffic near Exit 32 for Interstate 70 to shut down.

A person walking on Interstate 270 was killed early Friday ... Northbound lanes between exits 8 and 9 were shut down. That's near the Rockville-Gaithersburg border. All travel lanes reopened ...