A teenager and a man have been injured in a gas pipe explosion west of Melbourne, thought to have been caused by a plumber using a jackhammer on a stormwater drain.
Two explosions were reported at Maddingley, near Bacchus Marsh, on Thursday afternoon in what police described as a workplace incident.
The teenager suffered serious burns and was taken to hospital in Melbourne while the man was also injured, Ambulance Victoria and police say.
The explosions led to the evacuation of nearby properties and road closures.
It also prompted a warning from authorities about a toxic plume. Fire crews and WorkSafe Victoria are investigating the cause of the blasts.
A refuge centre has been set up at Bacchus Marsh's Lerderderg Library for residents forced to evacuate.