One dead, at least four injured after gas explosion in Belgium

One person has been killed and at least four people are injured after a gas explosion in Belgium.

Police Officers control the security perimeter of the Charleroi police station in Charleroi, Belgium, 09 August 2016. Source: EPA

One person has been killed and at least four injured in Belgium in an accidental explosion at a sports centre near the French border.

Chimay police Chief Pierre Maton said early on Friday that the blast was most likely ``a gas explosion,'' but an investigation into the cause was ongoing.

The blast in the town of Chimay, 120km south of the capital Brussels, happened just after midnight local time.

Several dozen police and firefighters were on the scene and the area had been cordoned off, but the damage was not as serious as initially feared.

Windows were blown out of the two-story building, and one corner of the structure was badly damaged but there was no major collapse.

Firefighters were on the scene early on Friday morning clearing the rubble and securing the building.

Police said they believed they have retrieved all the people from the rubble.

Chimay has a population of about 10,000 and is known for one of Belgium's most famous breweries.