According to the washington Post
Two people were killed and at least one other person was injured this morning in a five-car collision in Calvert County, police said.
The accident happened around 8 a.m. on Route 4 just north of Sixes Road (also called Route 506) and caused backups on Route 4 in both directions, said Det. Sgt. Mike Moore of the Calvert County Sheriff's Department.
He said the two fatalities were in one vehicle, but there was no immediate information on the cause of the crash or other details. One injured person was evacuated by medical helicopter to a hospital, and others may have been treated and released at the scene, he said.
The accident occurred south of Prince Frederick in the southern Maryland county, Moore said.