Sydney: A tsunami warning was issued following a 7.5-magnitude earthquake that struck 150 km south of Papua New Guinea on Tuesday.

According to the US Geological Survey, the epicentre, with a depth of 10.0 km, was initially determined to be at 5.6 degrees south latitude and 152.1 degrees east longitude. It issued a "hazardous" alert within 300 km of the epicentre, Xinhua news agency reported.