Update, 1:25 p.m.: Police now say the two people who were killed were teenagers. For the latest updates on this story, click here.

Two people were killed and two others were injured before dawn Friday after a police pursuit through Chevy Chase ended in a fiery crash.

The incident began about 1 a.m., when a Montgomery County patrol officer saw a “suspicious vehicle” with four people inside on East West Highway at Jones Mill Road, police officials said.

When the officer ran the license plate number, he learned that the car had been reported stolen and attempted to pull it over.

The driver sped off, with police in pursuit. He lost control of the car, police said, and ran into a tree on Connecticut Avenue at Chevy Chase Circle, which is the D.C.-Maryland border. The car burst into flames.

Police were able to pull the driver and the front-seat passenger from the car, and they are being treated for their injuries.

The two passengers in the back seat died in the fire, police said. Their identities were not released, pending notification of next of kin.

The crash remains under investigation. Police closed a stretch of Connecticut Avenue for several hours, but reopened it in time for the morning rush.