A second car is being sought after a crash that killed two people early Saturday morning in Montgomery County as the cars raced on a highway, authorities say.

West Pottsgrove Township police responded at 12:02 a.m. to a crash that sent a 2007 BWM, which was going more than 100 mph on Route 422 East, through a guardrail then airborne into several tress before ending up on its roof down a 30-foot embankment, the county district attorney’s office reported on Facebook.

Driver Shone Santiago, 22, of New York City but who is a student in Exton, Pennsylvania, survived the wreck and was flown to Reading Hospital, the district attorney’s office said. He was in critical condition on Sunday evening, authorities said.

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Two passengers were cut from the car and declared dead at the scene, the district attorney’s office said. Autopsies were performed Sunday and identifications were pending their families being informed about the deaths.

Witnesses told police that a black, newer model Dodge Challenger with dark tinted windows, bright headlights and yellow fog lights was racing the BMW and initially stopped after the crash, the district attorney’s office said. The car had a Delaware license plate and fled, authorities said.

Anyone with information is asked to call Montgomery County detectives at 610-278-3368 or police at 610-323-2090.

Tony Rhodin may be reached at arhodin@lehighvalleylive.com. Follow him on Twitter @TonyRhodin. Find lehighvalleylive.com on Facebook.

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