CNN —Ukrainian forces are pushing further into the Kursk region of Russia, in a cross-border incursion that surprised even American officials, multiple US and Ukrainian officials tell CNN. Ukrainian forces are comprised of a mix of Ukrainian regular and special operations units, unlike previous Ukrainian operations inside Russia that often involved undercover units and local sympathizers. Russia claimed on Thursday to have halted a Ukrainian incursion into its territory, but later said that some battles are ongoing in the Kursk region. Neither the Ukrainian military nor the government in Kyiv has publicly commented on the operation. A Russian military blogger Rybar reported on Wednesday that the Ukrainian military had established control over a gas transit station near the border.

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Persons: Vladimir Putin, “ Sudzha, wasn’t, Alexei Smirnov, ”, Hochu, “, Kozak, Mick Ryan, Peter Stano, Karine Jean, Pierre, Biden, ” Jean, …, Niu York, HUR, Rybar, CNN’s Mariya Knight, Olga Voitovych Organizations: CNN, Russian Ministry of Defense, Russian Federal Security Service, Russian Defense, Telegram, Russian Ministry of Health, ., Federal Medical, Biological Agency, TASS, Reuters, Russian Defense Ministry, Futura, Institute for, Kyiv, Suspilne, Kyiv “, Ukraine Military Intelligence, LB, European Union, EU Locations: Kursk, Russia, Russian, Ukraine, Korenevsky, Ukrainian, Sudzhansky, Sudzha, Malaya Loknya, Kyiv, ”, Russia’s Kursk, Moscow, Pokrovsk, Niu, Toretsk, Europe