A full investigation has been launched after an explosion at a site belonging to BAE Systems in Monmouthshire.
South Wales Fire and Rescue Service said the incident happened at 10:49am at BAE Systems in Glascoed.
A BAE Systems spokesperson told Sunshine Radio: 'We can confirm that there was an incident at our Glascoed facility in Wales this morning.
'Tried and tested safety protocols were immediately enacted and emergency services attended the site.
'All personnel are accounted for and our emergency response team continues to monitor the facility. We have launched a full investigation.'
Sunshine Radio understands the explosion relates to a single shell going off at the munitions filling factory.
South Wales Fire and Rescue Service also confirmed it had been called to the scene and that an incident control post had been established.
A local source on the ground, said: "It wasn't that loud from where I was but it felt like an earthquake. My car shook."
Mother who held woman captive as a slave for 25 years jailed
Council appoints contractor to begin delivery of Hereford Bypass
Culture bids ‘must benefit county regardless of outcome’
Hereford pensioner despairs of Blue Badge renewal
Eight-figure sum quoted to fix Ledbury station access
Road patched over 200 times ‘still dangerous’
Herefordshire households to pay £20 more for police and fire
Pegasus FC cruise to huge win over Worcester Raiders in the Uhlsport Hellenic League Marsh Challenge Cup Semi Final