Highly toxic and flammable sewer gas in a 15m-high sewage tank at the Indah Water Konsortium (IWK) plant in Pantai Dalam posed a significant challenge for the search and rescue (SAR) team working to locate the Jalan Masjid India sinkhole victim.

A source told Bernama that the danger was identified after SAR team members were deployed to inspect the tank, initially with two personnel on Sunday and four on Monday.

“There are various hazardous gases...