Three Italian firefighters have been killed overnight in an explosion in a building in the northwestern region of Piedmont, APA reports citing ANSA News Agency.
The firefighters were responding to a report of an explosion in a disused section of a farm building in Alessandria province when a second, stronger explosion occurred early Tuesday.
Authorities are investigating whether the explosion was deliberate.
One of the dead was buried under rubble, the body only recovered after hours of digging.