Police have evacuated an area near Bacchus Marsh, north-west of Melbourne, after two people were injured in explosions believed to be caused by a ruptured gas pipe. A teenage boy has been taken to hospital in a serious condition with burns and a man has minor injuries, after the incident at Maddingley around 1:30pm. Police believe a gas pipe ruptured at a worksite, causing two explosions. The Bacchus Marsh Secondary College and Bacchus Marsh Grammar were evacuated, along with the Providence Catholic nursing home.