The country’s electricity authorities have begun their investigations on the cause of the disruption of supplies from the West Natuna gas field, which is the third such disruption in two years.

In a statement Energy Market Authority spokesperson Choo Wai Chan said, “The West Natuna gas coming in from Indonesia … was disrupted. The three power plants affected by Tuesday’s gas-supply failure had switched to alternative sources to restore the current.”

While Choo did not elaborate further, it is understood Singapore also pipes in natural gas from Sumatra and from Malaysia to power its power plants.