A woman struck by a vehicle and killed after crossing a street Monday night in Rockville with her son was identified as Raoudha Khelifi, Montgomery County Police said on Wednesday.

The incident happened around 8:25 p.m. near Chapman Avenue and Twinbrook Parkway. Khelifi, 44, of Rockville, was pronounced dead at a hospital and her 4-year-old son was hospitalized with minor injuries, police said.

Police said the driver of the vehicle involved remained on scene and cooperated with investigators. Neither he, nor his female passenger, were injured.

The department’s Collision Reconstruction Unit is investigating. The investigation may take months to complete, police said.

Anyone with information is asked to contact the collision reconstruction team at 240-773-6620.