The four countries pledged on Friday to deepen cooperation to ensure the Indo-Pacific region was free from "coercion", a thinly-veiled swipe at China's growing economic and military expansion.
The Quad discussed humanitarian and disaster response in the region, and agreed to help combat illegal fishing, she said.
"We agreed to boost maritime security support for Indo Pacific partners to strengthen their maritime domain awareness and ability to develop their offshore resources, to ensure freedom of navigation and overflight and to combat challenges such as illegal fishing."
(Reporting by Kirsty Needham; editing by Philippa Fletcher and Kim Coghill)
