Six people were taken to the hospital after a crash on the Baltimore-Washington Parkway on Tuesday.
The incident occurred about 11:30 a.m. on the southbound lanes of the parkway at Powder Mill Road.
U.S. Park Police said four cars were involved in the crash.
Six people were hospitalized, including one with life-threatening injuries, police said.
All southbound lanes of the Baltimore-Washington Parkway were closed for about two hours but reopened at 2:15 p.m.