Residents have been warned to close windows and stay indoors after a large fire broke out in a Ministry of Defence training area in Monmouthshire.
South Wales Fire and Rescue Service said the blaze was in a building containing 200 tonnes of cardboard and polythene in Caerwent, near Caldicot.
Gwent Police said the wind was taking large plumes of black smoke towards Caerwent and Llanvair Discoed.
Six fire engines were sent to the scene.
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.
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