China testing us, Joe Biden tells Quad leaders in hot mic blunder

US President Joe Biden was caught on a hot mic on Saturday (local time) telling leaders of the Quad nations -- India, Japan and Australia -- that China was "testing them", in remarks that underscored the threat of Beijing over territorial claims in the South China Sea.

Biden made the remarks during the Quad Leaders' Summit, which was attended by Prime Minister Narendra Modi, Australian Prime Minister Anthony Albanese and Japanese Prime Minister Fumio Kishida.