An off-duty captain with the D.C. fire department was on his way to work and stopped at the scene as police and fire officials responded, police said.
John Guillickson, 39, of Accokeek was taken to a hospital, where he was pronounced dead.
The incident is under investigation, but an initial finding was that the man was riding his bike north on McKendree Road when he was “struck by a vehicle from behind,” police said.
In a message on Twitter, police said that the “vehicle did not stop.” Officials said the vehicle “most likely has front end damage.”
No description of the vehicle was given.
Cpl. Nicholas Clayton, a spokesman for Prince George’s police, said the stretch of road where the collision occurred is dangerous.
“It’s a two-way road with trees on both sides, no sidewalks, no shoulder and no streetlights,” Clayton said. “It’s not a good place for a pedestrian to be riding a bike, even during the day.”
Clayton said the narrow road was wet Wednesday and that it was dark at the time of the collision, making for a “recipe for disaster.”
He said authorities are “hoping the person” who was driving the vehicle “comes forward.”