A fire at the Bombardier Aerospace plant in Belfast on Sunday evening is believed to have been ‘accidental’.
Airport Road had to be sealed off at two ends by police as firefighters tackled the blaze.
The Northern Ireland Fire and Rescue Service believe the blaze ‘appears to have started in machinery’ however the cause is under investigation. There are no reports of any injuries.
The first call was made to the NIFRS at 8.45pm on Sunday and they attended within two minutes. At one stage six pumping appliances, one aerial appliance and a high volume pump along with 50 firefighters and supervisory officers were involved in tackling the fire.
The fire service say they had the incident under control by around 11pm.
On Sunday night East Belfast MP Gavin Robinson described the blaze as "worrying".
"Worrying news coming from Bombardier, Airport Road of a large scale fire in the factory," he said.
"Praying that there have been no injuries. "Emergency services appear to have it under control.
"The following hours will tell us of the scale of damage on site."