South Whitehall Township police say a medical issue may have led a woman to crash into three other vehicles, injuring herself and one other person.

Dorothy Frey was driving a 1999 Oldsmobile on Monday morning on Walbert Avenue in South Whitehall Township.

Police said Frey drove around a 2003 Chrysler driven by Sherwood Ohlinger, also of Allentown, as Ohlinger was stopped at the red light at the intersection with Route 309.

2 people injured in 4-vehicle crash on Route 309 (PHOTOS)

Frey then hit the Chrysler, and kept traveling into the intersection, according to police. Frey struck a 2010 Subaru driven by Kathleen Dimmich, of Orefield, and then a PP&L service truck driven by employee Gyavira Bewayo, police said.

Frey's car became wedged underneath the PP&L truck, police said.

Frey and Dimmich were taken to Lehigh Valley Hospital in Salisbury Township for treatment of their injuries, police said.

Police are investigating the possibility that Frey suffered a medical emergency while she was driving. The crash is under investigation.

Sarah Cassi may be reached at scassi@lehighvalleylive.com. Follow her on Twitter @SarahCassi. Find lehighvalleylive.com on Facebook.

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