Three suspects are in custody after a hijacked car crashed.
The female victim was threatened by a man with a knife and forced from her vehicle in the Clooney Terrace area of Londonderry just after 10pm on Friday.
The PSNI said the man made off in the navy coloured Ford Fiesta and picked up two woman outside a nearby off licence before driving off at speed.
The PSNI said the car crossed the border a short time later and crashed on the road between Muff and Quigley's Point in Donegal.
"A man was arrested by Garda officers and remains in custody whilst the two females were taken to Altnagelvin Hospital for medical examination and subsequently arrested by PSNI officers," he said.
"Both remain in custody helping police with their enquiries."
The victim was not hurt but left shocked following the incident.
Police later charged two 20-year old women with aggravated vehicle taking causing damage to the vehicle.
They are due to appear at Londonderry Magistrates Court on Monday.