UPPER DARBY, Pa. (CBS) — Authorities are investigating after a woman was allegedly abducted and robbed by who she believed was a Lyft driver.

Upper Darby Police Superintendent Michael Chitwood says 31-year-old Brittney Lough and her 21-year-old sister partied at the Voyeur nightclub in Center City, and when leaving, the older sister says she used an app to contact a Lyft driver around 4 a.m. A man in a black 4-door vehicle pulled up to take them home to Haverford Township.

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At one point, the younger sister got out to get the driver a bottle of water for his medication in Upper Darby at a Sunoco on the 8200 block of West Chester Pike, but when she came out, the vehicle was gone and she called police. Chitwood says the older sister says she was eventually taken to Northwest Philadelphia, where the man demanded valuables and her phone.

Police say the man allegedly drove Lough to the 100 block of Champlost Road in Olney where he forced the woman out of the car. She told police the driver took her cell phone and credit cards before fleeing.

“She refused to give it up. He then grabbed her phone and grabbed her debit card. He then threw her out of the car, drug her out of the car, then threw her out of the car. He took off,” said Chitwood.

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Lough, who is hearing impaired, was located by police Wednesday around 10 a.m. She was not injured.

Police are now looking for the suspect described as a black male between the ages of 25 to 35, with an accent. The suspect’s car is believed to be a black four-door Nissan.

Lyft said in a statement that “there does not appear to be a Lyft ride matching the time, location or vehicle provided in these reports.”

“We have been in touch with law enforcement and will continue to assist their investigation,” the company said.

The incident remains under investigation.

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CBS3’s Joe Holden and KYW Newsradio’s Steve Tawa contributed to this report.