The drivers of both vehicles, who apparently knew each other, were exchanging words when the second driver pulled out a gun and fired into the tow truck around 5:45 p.m. on the eastbound side in College Park, Maryland State Police said.
The driver of the tow truck was taken by ambulance to an area hospital for treatment. The identity of the gunman is unknown. No other injuries were reported.
Initial and unconfirmed reports say this was a fatal accident.
Route 50 was closed for several hours following the shooting.
Given the nature of the case, Maryland State Police homicide detectives are leading the investigation. Anyone with information on this case is asked to call the College Park Barrack at 301-345-3101.
Click here to follow Daily Voice Bowie and receive free news updates.