A "small fire" at a nuclear power plant which provoked a major response by the emergency services has been extinguished without anyone suffering injuries, police have said.
The blaze at Hartlepool power station caused smoke to billow from the plant but Cleveland Police said it was drifting away from homes.
Police and fire crews remained on the scene as a precaution, the force spokeswoman said.
The force statement said: "Cleveland Fire Brigade and Cleveland Police are currently on scene at Hartlepool power station, Tees Road, Hartlepool, following a small fire at the plant, which has now been extinguished. There has been no injuries as a result of the blaze.
"During incidents such as this, there are several procedures that take place including the venting of steam generators. This particular process causes noise, which residents of nearby areas such as Seaton Carew may hear.
"There is smoke billowing as a result of the fire, but it is currently heading in a direction that does not cause any implications for members of the public. Police and fire (officers) remain at the scene as a precautionary measure."