SHOCKING IMAGES: 'Hundreds of thousands' of fish dead in Australia due to low level of oxygen

This comes just weeks after up to a million were killed, sparking fears an ecological disaster is unfolding. (Photo by ROBERT GREGORY / ROBERT GREGORY / AFP)

Hundreds of thousands of fish have died in drought-stricken Australia in the last few days and more mass deaths are likely to occur, the authorities warned Tuesday. (Photo by ROBERT GREGORY / ROBERT GREGORY / AFP)

The inspectors added that the latest bout of kills were likely linked to critically low levels of dissolved oxygen caused by a sharp drop in temperatures after an extended period of hot weather, the news agency reported. Image: Twitter @pdjmoo

Locals around the Darling River were confronted with a sea of white, as dead fish carpeted the waters near the southeastern Outback town of Menindee./ Image: Twitter @KirstiMiller30

The Darling River is part of the Murray-Darling River system that stretches thousands of kilometres across several states. With temperatures expected to rise and no rain forecast, there remained a high risk of further fish kills over the coming days and week, officials were quoted by AFP. Image: Twitter @pdjmoo

Inspectors from the New South Wales Department of Primary Industries have visited the site and said they found that hundreds of thousands of fish have died. Image: Twitter @margokingston1