Fire trucks were called to a sulphur fire at a Napier fertiliser plant last night.
The small fire, in a shed at the Awatoto plant, burned about one square metre of sulphur, said Napier fire officer Bryan Dunphy.
Fire crews used a front-end loader to separate the sulphur to prevent the fire spreading. "There is always the potential for a big incident if things aren't dealt with quickly," Mr Dunphy said.
The fire was thought to have been started by a spark from machinery.