Akter was taken to a hospital, where she died two days later, the statement said. The driver of the Audi remained on the scene and is cooperating with detectives, it said.
Speed and alcohol weren’t factors in the collision, police said.
There have been eight pedestrian fatalities in Fairfax County so far this year, according to police.
They asked anyone with information about the crash to contact them at 703-280-0543.