A “significant” fire that broke out at the Bombardier factory in the docks area of Belfast on Sunday night is being treated as an accident.
The NI Fire and Rescue Service (NIFRS) said the blaze is believed to have started within a machine at the plant.
The fire, which has now been extinguished, has damaged the roof and machinery but it was “localised to that area of the plant”, NIFRS added.
No one was in the area when it caught fire and there are no injuries.
NIFRS said some firefighters will remain at the scene to observe and monitor for potential hot spots. It said that Bombardier would carry out its own investigation into what happened.
Airport Road, where the factory is situated, remains closed.
The fire broke out on Sunday night, with the fire service receiving a call at about 20:45 BST to attend the blaze in the east of the city.
Bombardier, an aerospace company, is one of Northern Ireland’s largest employers.
In a statement on Sunday night, it said there were no employees working in the factory at the time, adding that it would take time to assess any damage.
The fire service said six pumping appliances, one aerial appliance, and a high-volume pump were used to contain the fire.
Fire Service Area Commander Dermott Rooney described it as a “very significant” blaze.