Fire at WormTech building at Caerwent treated as arson
Fire chiefs are treating a blaze at a waste recycling centre in Monmouthshire as arson.
Residents were warned to close windows and stay indoors after the large fire broke out at WormTech in Caerwent, near Caldicot.
South Wales Fire and Rescue Service said 45 firefighters fought the blaze at a 10m by 30m building containing 300 tonnes of cardboard and packaging.
WormTech is based inside a Ministry of Defence training area.
The alarm was raised at 1140 BST and the was brought under control shortly after 1400 BST. Six fire engines were sent to the scene.
The fire service said it was investigating the cause, but it believes the blaze was started deliberately.
Gwent Police had warned that the wind was taking large plumes of black smoke towards Caerwent and Llanvair Discoed.
According to the Ministry of Defence website, the Caerwent training area consists of 1,250 acres within a security fence.
There is a network of 31 miles of roads, more than five miles of railway sidings, 400 buildings, open pasture land and woodland.