Seven members of Caterham's Formula 1 team were taken to hospital after a small fire broke out in the pattern machine shop late on Wednesday evening at the team's factory in Leafield.
Staff were taken to nearby hospitals after the fire broke out but six have since been released.
'The source of the fire was quickly identified and was put out, but quite a lot of smoke was generated,' read a Caterham statement.
'Seven members of staff who came into contact with the smoke whilst dealing with the incident were advised by an ambulance crew to go to two local hospitals for observation. All but one have since been released without issues and the remaining member of staff will stay in hospital for further checks, but his condition is reported to be OK.
'An investigation into the cause of the fire started this morning and the machinery affected is already operational, creating parts that will be used on the team's Formula 1 race cars at the first Formula 1 in-season test in Bahrain on April 8th and 9th.
'Steps will be taken to ensure this type of incident does not happen again.'