Three people, critically-injured in a two vehicle crash in Oakhill on Tuesday, remain today in Halifax hospitals. Two boys, ages 9 and 13, are at the IWK while a 37 year old woman is in the QE-2. All three are said to still be listed as critical. The 9 year old boy was airlifted from the scene Tuesday afternoon in Oakhill to the IWK while the other boy and woman were rushed to Halifax by ground ambulance. Two other people in a second vehicle involved in the accident, an SUV, were treated at South Shore Regional Hospital and have been released. The RCMP are still investigating and haven't determined an exact cause of the crash, although road conditions at the time were snowy and slippery.