Gregory Jonathan Atwood, 40, of Silver Spring, was hit and killed at the intersection of Georgia and Hewitt avenues in the Aspen Hill area, Montgomery County police said Friday.

ASPEN HILL, Md. — Police in Montgomery County are investigating a hit-and-run crash that killed a pedestrian early Friday morning in the Aspen Hill area.

Gregory Jonathan Atwood, 40, of Silver Spring, was hit and killed at the intersection of Georgia and Hewitt avenues, Montgomery County police said Friday.

“The pedestrian was located in the southbound lanes of Georgia (Avenue),” said Sgt. Rebecca Innocenti with the county’s police department. “He did succumb to his injuries at the scene.”

Evidence collected by detectives suggests that Atwood was hit by at least two vehicles sometime around 4 a.m. Neither driver stayed at the scene.

“After the initial vehicle struck the pedestrian, at least one additional vehicle struck the pedestrian as well,” Innocenti said. “Detectives are asking for the public’s help.”

As the investigation unfolded, police said they knew very little about the vehicles involved.

Detectives said the only information they had was that the crash likely involved a silver vehicle and may have involved a Chrysler 200 or Dodge Avenger.

“They have no information about any vehicles or any drivers of those vehicles,” Innocenti said. “We’re asking anyone who may have been in the area at the time of this collision, anyone who saw something suspicious or just has information to please call.”

Anyone with information is urged to call police at 240-773-5500.

While police blocked off part of Georgia Avenue for that incident earlier on Friday, another investigation related to a pedestrian crash was happening in nearby Prince George’s County.

Officers closed westbound Martin Luther King Jr. Boulevard at Forbes Boulevard in the Lanham area after a woman was hit by a car traveling southbound.

The woman was taken to the hospital with serious injuries, and the driver remained on the scene.