Five people have been injured by a rally car which left a track and careered into a crowd of spectators.
Two adults and three children were taken to hospital with injuries not believed to be life threatening.
The incident happened just before midday at Royal Bath and West Showground in Shepton Mallet, Somerset.
The one-day Regency Stages Rally, featuring 55 miles of Tarmac rallying across 10 stages, was being held at the venue.
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A spokesman for Avon and Somerset Police said the condition of the rally driver involved in the crash is unknown.
"There is a joint investigation involving the police and the Health and Safety Executive into the incident," he said.