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This is the Worldin Brief from The Economist, our top stories.

More than 50 heads of state and government gathered in Switzerland for a summit that Ukraine's

President Blodemizelenski said could help to bring a just and lasting peace for his country.

Attendees include Emmanuel Macron of France, Olaf Schultz of Germany, and Kishilafumio of Japan.

President Joe Biden, however, is a notable absence.

America is instead being represented by his Vice President,

Carmelah Harris. In a meeting with Mrs. Selensky, Ms Harris said that America would give Ukraine a

further $1. billion dollars in aid.

Russia was not invited to the summit.

The Israel Defence Forces said that eight soldiers had been killed in an explosion in Gaza on Saturday, the most in the single incident since January.

After months of talks, a ceasefire between Israel and Hamas still looks remote.

Gaza's Hamas-run health authority says 37,000 people have died in the strip since Israel's

offensive began in response to Hamas's attack last October. G7 leaders concluded their summit in Italy with a warning to China that they will continue to target actors that materially support Russia's war machine.

They called on the superpower to stay. materially support Russia's war machine.

They called on the superpower to step up efforts to promote international peace and security.

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