Two people were killed and two others were injured after an early morning crash on Fairfax County Parkway near Walnut Branch Road yesterday.

Tonnisha McCoy, 21 and Joselyn Herndon, 23, were killed in the crash.

Detectives are looking for witnesses to help with the investigation. Alcohol and speed may have been factors that caused the crash around 2 a.m. on Sunday.

Police believe the driver lost control of the car as it traveled northbound on Fairfax County Parkway. The car rotated and left the roadway.

At least one other car was on the scene during the crash and remained on-site when officers arrived.

Due to the complex nature of the investigation, detectives are asking anyone who may have witnessed the crash or has information to call 703-280-0564.

Photo via Fairfax County Police Department