There was an explosion in Milan

An explosion has occurred in the center of Milan, Italy. The fire engulfed several parked cars, a column of black smoke rises above the houses. 

The newspaper Corriere della Sera writes with reference to eyewitnesses that a van with oxygen cylinders exploded in the city. Previously, at least four people were injured. Firefighters arrived at the scene of the incident, people are being evacuated from neighboring houses and a nearby school.