Two people are dead after an early morning crash involving two vehicles on the northbound side of the Baltimore Washington Parkway.It happened just before 2 a.m. right before Route 202 in Hyattsville, Md. At one point the entire parkway was shut down. Investigators say that a sedan clipped a pickup truck that was slowing down to exit on Route 22. The sedan flipped over and two people who were in it died. Two other people are critically injured and were taken to the hospital.