EMERGENCY services are currently tackling a major fire at the Nu-Pro aerospace and defence industries factory at Griffin Mill off London Road, Stroud.
The fire broke out around 8.30pm and there are reports on social media that an explosion was heard.
There were rumours that a person was trapped in the building but this was not the case it has now been confirmed.
Fifteen fire appliances are at the scene and there are unconfirmed rumours that some nearby properties may need to be evacuated.
London Road is closed at Griffin Mill.
The fire can be seen across the valley and shoppers in Waitrose said they could smell smoke in the air. Residents say the smoke could be seen as far away as Stonehouse.
There is congestion at the British Oak junction.
London Road is closed around 100 yards from the British Oak junction in the Cirencester direction.
Nu-Pro Limited describes itself as a 'key manufacturing solution provider for the aerospace and defence industries'.
Speaking at at 11pm, a spokesman for Gloucestershire Fire and Rescue Service, said: ”Gloucestershire firefighters are dealing with a large fire off London Road in Thrupp, Stroud.
"Crews arrived at the scene just before 8.30pm this evening.
"There are currently 15 fire engines and one aerial vehicle on site.
"Around 60 firefighters are tackling the fire using eight jets and 12 breathing apparatus.
"The industrial building around 50x30 metres is well alight and firefighters are expected to be there for some time.
"Due to chemicals that are thought to be contained in the building neighbouring units have been evacuated and local residents are being encouraged to stay indoors and keep their windows closed.”
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