A barn containing around 300 bales of hay is ablaze on the Revallagh Road, between Coleraine and Bushmills.
A massive smoke plume is visible for miles.
In a statement to Causeway Coast Community a NIFRS spokesperson said: "SIX fire appliances are currently at the scene. 2 from Coleraine Fire Station, 2 from Portrush Fire Station, 1 from Dungiven Fire Station and 1 from Ballymoney Fire Station.
The incident is ongoing"
Three stop valve chambers set alight in Portrush
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