A former police officer has died after an alleged hit-and-run in northern NSW, moments after she allegedly took a photo of the car involved.

Lisa Ward, 55, was walking her dog as usual in the small town of Ulmarra, about 15km north of Grafton, when she was struck by a white 4WD on Coldstream St about 4.50pm on Tuesday.

Police allege the driver did not stop and drove off along Big River Way towards Grafton, leaving Ward with serious injuries.

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Despite the efforts of paramedics, she died at the scene.

A crime scene was established and an investigation launched.

Police located and seized a 4WD in South Grafton about 7.40am on Wednesday and arrested a 50-year-old man.

He was taken to Coffs Harbour Police Station, where he was assisting police with inquiries.

Police sources told The Daily Telegraph Ward had taken a photo of the vehicle’s number plate after seeing it being driven recklessly.

She allegedly took the photo when the car was parked on Coldstream St, moments before the 4WD was allegedly driven at her.

The Daily Telegraph also reported Ward was a former officer attached to the Coffs/Clarence Police District, who had retired a few years ago.

An Ulmarra resident told the publication Ward was well known in the community and regularly walked her dog near the area every afternoon.

The man is yet to be charged.

Anyone with information is urged to contact Crime Stoppers.

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