A fire took place on Friday morning at the Tuas manufacturing plant of Norway-headquartered solar energy firm REC.
The fire broke out at about 11am and involved three exhaust fans on the building's rooftop. The Singapore Civil Defence Force (SCDF) sent three fire engines and several other supporting vehicles to the scene.
They put out the blaze within 20 minutes of arrival.
Part of the outer wall of the plant was observed to be blackened and burnt and the building had been evacuated, when The Straits Times arrived on the scene. No injuries were reported.