Motorists are advised that the Creamery Road and Ballylagan Road in Coleraine have been closed to traffic while NIFRS deal with an ongoing incident at Ballyrashane Creamery
Motorists should avoid the area and seek alternative routes for their journey.
Firefighters have isolated a leak at the premises and there is no immediate risk to life or property,” a spokesperson for the fire service said.
“The premises has been evacuated and all persons inside the property have been accounted for.”
Six fire appliances - from Coleraine, Portrush, Ballymoney and Strabane - were sent to the scene.