An incident that claimed the life of a motorcyclist on Sunday has been described as a "terrible tragedy".
The crash happened at around 12.50pm on the Belfast Road near Newtownards, close to the junction with Milecross Road.
He was 21-year-old Jay Curtis Reardon from Holywood Hills.
Inspector Jim McGrillen asked for anyone with information to contact the police.
"Our investigation into the circumstances of the collision is at an early stage and I am appealing for witnesses," he said.
"We would especially like to hear from the driver of a blue or purple Ford Kuga who is believed to have stopped at the scene but left prior to the arrival of police. The number to call is 101, quote reference 663 31/07/16"
The Mayor of Ards and North Down Borough Council, Deborah Girvan, said: "It is such a tragedy, another death on our roads. The police said the roads were closed and they were investigating the accident.
"It is at Bradshaw's Brae on the old Belfast Road and there is a series of bends around there, although I don't know precisely where it happened.
"I would like to pass on my condolences to the family.
"Motorcyclists and cyclists really do need to take care on the roads, as do drivers. All road users have to be courteous.
"I was coming down the Ballydrain Road where I live and a car overtook a cyclist and nearly came headlong in to me. We need to sit back and take stock. There are too many deaths on our roads and we all need to take much extra care."
Newtownards councillor Jimmy Menagh said the accident was a "terrible tragedy".
"I'm a motorbike man myself," he added. "That's all I have, I don't have a car. It is only a wee 125 and the only time I don't use it is in the frosty weather."
He also passed on his thoughts and prayers to the friends of family of the victim.
Ards Alliance councillor Alan McDowell added: "It is a terrible tragedy and I would like to pass on my condolences to the family.
"It is a dangerous stretch of road. There has been a number of serious accidents over the years."
Bikers from across Northern Ireland are planning a 'ride out' in memory of Jay.
A Facebook page created for the event said: "We are looking to go along the Newtownards Peninsula down to Portaferry then back to Hollywood via Ballywalter as he loved that route and was his last full time out on the bike."
The event is planned for Sunday from 1pm. More details will be posted on Facebook.