MORE than 50 firefighters from across the Teesside area are tackling a fire at Haverton Hill, near Stockton.

The blaze broke out at a fertiliser company which employs hundreds of people at its Teesside base.

CF Fertilisers, formerly Growhow UK, produces ammonia and other chemicals for use in agriculture and in the process industries.

A cordon was initially put in place around the area, but all roads have since reopened. The fire is understood to be under control.

A spokesman for Cleveland Fire Brigade said the blaze broke out in one of the workshops.