A nine-year-old Woodstock girl is in critical condition after suffering serious burns while attempting to drain gas from a minibike.

Woodstock police say the girl and two boys, aged 14 and 15, were trying to transfer the gas from the bike to another source.

While doing this, the gas ignited and all three suffered burns.

Police were called to a home in downtown Woodstock just before 2 p.m. on Saturday.

The girl was airlifted to hospital in London and one of the boys was also sent to hospital for treatment.

Police had no update today on the status of their injuries. The investigation is continuing.