Firefighters have been called to GKN Aerospace in East Cowes tonight (Friday).
Multiple appliances have been called to the site on Ferry Road.
The Hampshire and Isle of Wight Fire and Rescue Service were called at 6.43pm.
The building has been evacuated after smoke could be seen coming from the Sprinkler Activation System.
More follows.
UPDATED 7.40AM SATURDAY
The Fire Service says the fire was out at 8pm.
Appliances from Newport, Ryde and East Cowes were in attendance.