Leaders of Australia, India, Japan and the United States will announce plans for new security initiatives in the Indian Ocean on Saturday, while outgoing U.S. President Joe Biden is hosting counterparts from the Quad grouping established out of shared concerns about China.

President Joe Biden is convening the leaders of Australia, India and Japan for a Quad summit in his hometown of Wilmington, Delaware, this weekend, aiming to put a final stamp on an alliance he hopes will endure beyond his presidency.

"It will survive way beyond November," Mr. Biden declared of the Quad as the leaders gathered at the Archmere Academy, his high school alma mater.