Russia's Foreign Ministry said Ukraine used Western rockets, likely U.S.-made HIMARS, to destroy a bridge over the Seym River in the Kursk region, killing volunteers trying to evacuate civilians.
"For the first time, the Kursk region was hit by Western-made rocket launchers, probably American HIMARS," Maria Zakharova, spokesperson for the Russian Foreign Ministry, said late Friday on the Telegram messaging app.
"As a result of the attack on the bridge over the Seym River in the Glushkovo district, it was completely destroyed, and volunteers who were assisting the evacuated civilian population were killed," she said.
There was no indication of how many volunteers were killed in Friday's attack.
Ukrainian army chief Oleksandr Syrskyi said that Kyiv's forces had advanced between 1 and 3 kilometers (up to 1.8 miles) in some areas in the Kursk region on Friday, 11 days since beginning an incursion into the western Russian territory.
Kyiv claimed to have taken control of 82 settlements over 1,150 square kilometers (444 square miles) in the region since August 6.
Russia's Defense Ministry, cited by the Interfax news agency, said on Saturday that Russian forces repelled several Ukrainian attacks in the Kursk region, but it did not report recapturing any territory.
It said Ukrainian forces had unsuccessfully attempted to advance towards the villages of Kauchuk and Alekseyevskiy, which lie roughly halfway between the Ukrainian border and the Kursk nuclear power plant.
In a separate statement, the ministry accused Ukraine of planning to attack the plant in a false flag operation.
Reuters could not independently verify either side's battlefield accounts.
Russia has accused the West of supporting and encouraging Ukraine's first ground offensive on Russian territory and said that Kyiv's "terrorist invasion" would not change the course of the war.
The U.S. HIMARS rockets provided to Ukraine have a range of up to about 80 kilometers (50 miles).
The United States, which has said it cannot allow Russian President Vladimir Putin to win the war he launched in February 2022, so far deems the surprise incursion a protective move that justifies the use of U.S. weaponry, according to officials in Washington.
