Authorities have confirmed that the individuals involved were four brothers from New Jersey.
The two passengers seated in the rear, aged 18 and 22, were thrown from the vehicle and succumbed to their injuries.
The driver and the front passenger, aged 18 and 23, were transported to local hospitals, where they are currently in critical condition.
"It appears that all individuals are adult males. One person was ejected from the vehicle and was pronounced deceased at the scene. A second individual was declared deceased at a nearby hospital," stated Philadelphia Police Inspector D.F. Pace.
Witnesses reported to the police that a Mazda and a Dodge Challenger were racing at a high speed on I-95 northbound when the Mazda's driver lost control.
The exact reason for the loss of control remains unclear, but sources suggest that street racing may be a factor.The names of the victims have not yet been disclosed.
Additionally,
Pennsylvania State Police reported that a puppy traveling in the vehicle was also ejected and found deceased.
Anyone who witnessed the incident is encouraged to contact the Philadelphia police.