Armed woman causes 20+ hour police standoff and road closure in Fairfax County, VA.

A standoff in the Hybla Valley area of Fairfax County continues as an armed woman suffering from a mental health crisis has barricaded herself inside a car with a handgun. Crisis negotiators and other law enforcement officials are on the scene, and Richmond Highway is closed between Lockheed Boulevard and Boswell Avenue. The woman may have a connection to a recent missing persons case, but police have not confirmed this information. No injuries have been reported.