Twenty-two people were evacuated from their homes overnight after a gas leak in Bouvignes, near Dinant, in Namur province.
The leak happened in Rue de Meuse in the early hours of Wednesday, according to Dinaphi emergency zone spokesperson Patrice Liétart.
A vehicle crashed into a gas meter box at street level before the driver left the scene.
According to the spokesman, a neighbour was woken by the sound of the impact and the hiss of gas escaping from the low-pressure pipe.
Emergency services found that the pipe had been completely ruptured.
Working with police, they evacuated homes within a 50-metre radius.
Utility company Ores secured the pipe by fitting a temporary cap.
As a precaution, rail traffic on nearby line 154 was also suspended.
Residents were allowed to return to their homes safely shortly before 04:00.
