KUALA LUMPUR: About 40 barrels of chemical waste have been found at the premises believed to be the cause of the water pollution in Sungai Selangor.
Gombak police chief Assistant Commissioner Arifai Tarawe said each barrel could fill 1,000 litres of liquid, with some already emptied.
"This rented facility is located about 300 metres from the Indah Water Konsortium (IWK) sewerage plant in Taman Velox, Rawang.
"It is believed that the perpetrators had dumped the chemical waste through a sewage hole in the premises.
"The Chemistry Department is in the midst of sampling the waste," he said.
Arifai added that the facility had only been rented two weeks ago.
The registered nature of the business, he added, was still under investigation.
"We will continue to investigate this matter further. We don't discount the possibility of sabotage," he said.
The four suspects, including two directors of a roadworks construction company linked to the latest water pollution incident in Sungai Selangor have been remanded for seven days beginning today.
The suspects comprised a 40-year old woman and 43-year old man who are the company directors, and two workers including a foreigner from Bangladesh aged 42 and 33 respectively.
Four major water treatment plants (LRAs) in Selangor were forced shut due to the pollution incident yesterday.
Pengurusan Air Selangor Sdn Bhd (Air Selangor) said as a result, 1,139,008 accounts in 1,279 areas in Kuala Lumpur, Petaling, Klang, Shah Alam, Kuala Selangor, Hulu Selangor, Gombak and Kuala Langat were affected by water supply disruptions.
Water supply is expected to be fully restored by 3pm today.