Four incidents that could potentially cause water pollution were detected in Selangor over the past week but were addressed immediately, said Menteri Besar Amirudin Shari.

He said the latest incident took place yesterday, when an oil spill was detected in a river in Kampung Baru Balakong but probes by the relevant agencies found that it did not come from any factory or workshop around the area.

“Three days ago, we detected the same type of pollution in Sungai Kundang...