Sydney, May 6 -- Four false killer whales have died after a group became stranded on a beach on Australia's south coast.

Authorities in Western Australia said on Tuesday that seven false killer whales were found on House Beach, over 400 km southeast of Perth in the state's Great Southern region, on Monday afternoon local time.

The Department of Biodiversity Conservation and Attractions (DBCA) confirmed that four of the false killer whales, which are a species of oceanic dolphin that bears a resemblance to orcas, died overnight, while three were still alive on the beach as of Tuesday morning.

A spokesperson for the DBCA said that staff were on the scene and assessing the situation to determine the most appropriate and humane course of ...