Leaders of the Group of Seven major industrial countries are set to introduce new measures aimed at curtailing Russia's ability to continue invading Ukraine, a senior U.S. administration official said Friday.

The official, who spoke on condition of anonymity, said the leaders will later in the day deliver a "powerful statement of unity, strength and commitment" in response to Russia's aggression after they begin the three-day discussions in Hiroshima.

"You will see new steps taken to economically isolate Russia and to weaken its ability to wage war," the official said, adding that a separate G-7 statement on the Ukraine crisis will contain further commitments to squeeze Russia's access to the international financial system, prevent it from evading sanctions and reduce reliance on its energy.

To augment efforts to hold Russia accountable, the official said, the United States will also roll out a "substantial package" of its own measures.

People make an offering of flowers at the Tomb of the Unknown Soldier in Ukraine's capital Kyiv on May 8, 2023 -- the 78th anniversary of the official end of World War II in Europe -- amid Russia's invasion of Ukraine. (Kyodo) ==Kyodo

Without going into details, the official said the plans include extensive restrictions on categories of goods key to the battlefield and placing about 70 entities on its blacklist to prevent them from receiving U.S. exports.

In addition, the U.S. government will tighten sanctions on Russia, newly targeting some 300 individuals, entities, vessels and aircraft, according to the official.

"All G-7 members are preparing to implement new sanctions and export controls," the official said.

The leaders of Britain, Canada, France, Germany, Italy, Japan and the United States, as well as the European Union, will have a session on the war in Ukraine on Friday.

Ukrainian President Volodymyr Zelenskyy is due to join the G-7 summit online on Sunday, according to the Japanese government.

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