Two spectators and a Mini Challenge race car driver have been cleared of any serious injury after an incident at the City of Ipswich 300 at Queensland Raceway, venue for the latest round in the 2010 V8 Supercar Championship Series.

The car was involved in on-track incident and rolled over a protective barrier into a crowd gathered at turn six of the track. Medical crews and Police were on-site immediately.

All three were transported to Ipswich General Hospital for precautionary tests. The driver of the Mini Challenge car, Kaine Magro, was released from Hospital soon after.

The two male spectators, a 59-year-old with a cut to the forehead, and a 60-year-old, with mild concussion, suffered only minor injuries. At the time of issue they were undergoing precautionary CT scans.

Emergency crews were on site within minutes along with medical staff and Police. Racing re-commenced after a short delay to the programme.

CAMS, the Confederation of Australian Motor Sport, which is responsible for motorsport safety within Australia, will investigate the incident.