A 19-year-old student has died following a hit and run on the outskirts of Armagh.
Pedestrian Lesley-Ann McCarragher was airlifted to the Royal Victoria Hospital in Belfast following the incident on the Monaghan Road in Armagh on Saturday afternoon.
However she died in the early hours of Sunday morning.
A 17-year-old boy has been arrested and is currently in custody assisting police with their enquiries.
Detective Inspector Brian Foster has appealed to anyone who was on the Monaghan Road, Armagh on Saturday around 12.30pm and may have witnessed this incident to contact police at Armagh.
He made a specific appeal for the driver of a white Saab car to come forward.
Lesley-Ann is a former head girl at the City of Armagh High School.
The school has expressed its sadness at her death.
"The school mourns the passing of past pupil and Head Girl Lesley-Ann McCarragher who passed away early this morning (Sunday)," the school said in a statement on its Facebook page on Sunday.
"So many people from the school have fond memories of Lesley-Ann and we would like to send out condolences to her family and many friends at this time."
Also paying tribute on Facebook, a teacher at the school wrote: “Lesley-Ann was a beautiful, fun loving and outgoing young girl who put her heart into everything she did. It was a pleasure to teach Lesley-Ann at Aghavilly Primary School and to see the further commitment she made to her studies at City of Armagh High School, The Royal School, Armagh and more recently Loughry College.
“She worked hard but always remembered how to have fun. You will be sadly missed Lesley-Ann.”
Jackey Mitchell wrote on Facebook: "Lesley-Ann was one of the nicest most beautiful people I had the pleasure of knowing."
Victoria McCarten added: "Thoughts and prays with her family at this sad sad time. I remember playing hockey with Lesley-Ann through school. Such a pleasant girl. Xx"
The teenager had also attended the Royal School, Armagh, and was studying at Loughry College before her death.
DUP representative William Irwin also extended his sympathies to Lesley-Ann's family.
"This is an extremely concerning and very sad situation for Lesley-Ann's family and I want to pass on my deepest sympathy and my prayers to the McCarragher family at this very traumatic and difficult time," he said.
"I would echo the calls by police for any members of the public who may have witnessed this incident and the vehicle involved, to come forward immediately with any information."