Explosion of Italian buildings

November 5, according to foreign media reports, 5 local time, Italy’s northwest Piedmont (Piedmont) area a building explosion, killing three firefighters were killed.
Earlier in the day, firefighters went to deal with an explosion in an abandoned farm building in Alexandria, sky tg24 reported. In the meantime, a more powerful explosion occurred at the scene.
According to reports, one of the victims was buried under the rubble, after hours of excavation, the body was found.
Ansa news agency said authorities are investigating whether the explosion was deliberately triggered.