Israeli tanks and warplanes bombarded the Gaza Strip on Tuesday, killing dozens of Palestinians, and U.S. President Joe Biden warned Israel it was losing international support because of its "indiscriminate" bombing of civilians in its war against Hamas militants.

In a further sign of world concern over the conduct of the conflict, now in its third month, Australia, Canada and New Zealand said they supported international efforts towards a sustainable ceasefire. They expressed alarm at the plight of civilians in Gaza.

At the United Nations, the 193-member U.N. General Assembly was preparing to vote on a resolution calling for a ceasefire. Diplomats said it was expected to pass. The United States vetoed a similar call in the 15-member Security Council last week.

Biden said Israel now has support from “most of the world” including the U.S. and European Union. “But they’re starting to lose that support by indiscriminate bombing that takes place,” he told a campaign fundraising event in Washington.