KUALA LUMPUR, June 28 -- More than two tonnes of dead freshwater tilapia have been found floating in the Melaka River near Taman Rumpun Bahagia Bachang since Thursday, according to authorities.

The Melaka Water Regulatory Body (BKSA), in a statement yesterday, said investigations are under way to determine the cause of the mass fish deaths.

The probe includes allegations that the incident may have been triggered by an oil spill or chemical odour, based on complaints received on Thursday night.

"Investigations to trace the source of the pollution are actively being carried out from the Batu Hampar area through nearby industrial zones upstream along the Melaka River.

"Emergency clean-up operations have also been activated, in collaborat...