Wolfenbüttel (dpa / lni) - An empty restaurant in Wolfenbüttel caught fire on Christmas Day.
The fire brigade was able to prevent the fire from spreading to neighboring houses, the police said on Friday.
Several petrol cans were found, the investigators assume, according to a police spokesman, of arson.
According to witnesses, there were several popping noises from inside the building.
A firefighter suffered minor injuries during the extinguishing work.
He was treated in a hospital.
The building, currently under renovation, suffered considerable damage.
The amount of damage is still unclear.