The Irish motorcycle racer, Darran Lindsay, has been killed in a practice race at Killalane Road Races in Skerries in north Co Dublin.
It is believed the crash, which happened yesterday evening, involved at least one other motorbike.
The 34-year-old racer from the village of Dundrod in Co Antrim was a former Ulster Grand Prix winner and four-times Irish champion.
He is survived by his wife and three children.
