Authorities investigate a fatal cyclist crash in Gaithersburg. A 16-year-old boy was pronounced dead at the scene, a police spokesman said. (Montgomery County Fire and Rescue Service)

A 16-year-old Gaithersburg boy died Thursday after he was struck by a vehicle during a bicycle ride, a Montgomery County police spokesman said.

Authorities identified the bicyclist as Santos Escobar-Villatoro, of the 100 block of North Summit Avenue in Gaithersburg. He succumbed to his injuries at the scene.

Police said the teen was riding his bicycle on a sidewalk in Gaithersburg. Officer Rick Goodale, a department spokesman, said investigators believe the 16-year-old fell from his bicycle and landed into oncoming traffic just before the collision.

Officers were called to the area of South Frederick and Fulks Corner avenues around 2:34 p.m. Thursday for the accident.

Goodale said crash investigators believe the teen was riding his bicycle north on South Frederick Avenue on a southbound sidewalk. At some point, he said the 16-year-old struck a commercial sign on the sidewalk that police believe caused him to fall into the roadway.

He was struck by a 2004 Toyota Highlander, Goodale said. He added that the driver stayed on the scene.