A huge blaze at a Sunderland industrial estate caused a factory roof to collapse.
Eight fire crews were called to the disused Unit 5C at Southwick Industrial Estate, off North Hylton Road, at 2.45am today.
South Shields firefighters say they were one of a number of crews called to the factory unit.
They say the factory was disused but there were lots of bundles, believed to be clothing, inside that had been set on fire.
The blaze caused the roof to collapse and the cause is still under investigation.
Sunderland Central firefighters say there were seven fire engines and two special appliances called to the blaze.
The building is 200m x 200m in size and there are still firefighters on scene.
At around 6.15pm yesterday, four fire crews were called to a large scale fire at the derelict building.
Four engines from Marley Park, two from Sunderland and one from Washington were called to the unoccupied building where bundles of clothes were set alight.
Crews used four breathing apparatus and one hose reel jet to put out the fire by 7.30pm.
A fire service spokesman from Marley Park said they were treating the blaze as arson.
No one was injured, but fire fighters are warning children of the dangers of playing in derelict buildings and are warning them they could become trapped.
Fire crews are working with police to try to establish the owner of the property.