A teenage boy was also injured in the crash.
A teenage girl is in a serious condition following a road traffic collision on Sunday (1 May).
The single vehicle collision occurred at Meenformal, Glen, Carraig Art in Donegal at approximately 9.15pm.
A male and female, both aged 17, were taken to Letterkenny University Hospital to be treated for their injuries.
The girl has since been transferred to Beaumont Hospital, where she is understood to be in a serious condition.
Gardaí are appealing to any person who may have witnessed this collision to contact them.
Any road users who were travelling in the area at this time and who has camera (including dash cam) footage, is asked to make this available to investigating Gardaí.
Anyone with information can contact Milford Garda Station on 074 915 3060, the Garda Confidential Line on 1800 666 111 or any Garda Station.
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