A boy was killed in Fairfax City early Saturday morning after the car he was riding in crashed as it fled from a Virginia State Police trooper and Fairfax County officer, authorities said.

Police did not immediately identify the boy or provide his age, saying they were working to notify his family members of the incident. They said they had charged the 15-year-old driver of the car he was riding in with involuntary manslaughter, attempting to elude police, hit-and-run and driving without a license. They also did not identify the driver, saying he had been charged as a juvenile.

The incident began about 12:45 a.m., when a Virginia State Police trooper spotted a Honda Accord “driving erratically at a high rate of speed” on Route 236, just outside the Fairfax City limits, state police said. The trooper turned on his lights to try to pull the Honda over, but it sped away, police said.

Corinne Geller, a Virginia State Police spokeswoman, said a Fairfax County police officer had apparently already been chasing the Honda, but the trooper did not know that as he pulled out. She said that the trooper would have been allowed to chase the speeding vehicle and that he had properly called in for approval as he began the pursuit.

Police said that the Honda ran a red light at the intersection with Route 29 and collided with a Toyota Camry, which had the green light. The driver of the Honda then got out and tried to flee but was taken into custody by the trooper, police said. The trooper had stopped at the intersection, Geller said.

Police said a juvenile passenger in the Honda was killed, and the Camry’s driver sustained non-life-threatening injuries. The 15-year-old also sustained non-life-threatening injuries, police said.

Geller said she was unsure how long the entire encounter lasted.