Russia has prepared tens of thousands of troops for an offensive to retake the Russian region of Kursk, which Ukraine has held for months, according to Kyiv's commander-in-chief, Col. Gen. Oleksandr Syrskyi.

Syrskyi said the threat of the Russian troops "cannot be underestimated," warning they were prepared to mount an attack on Kursk.

"Now, following the order of their military leadership, they are trying to dislodge our troops and advance deep into the territory we control," Syrski wrote in a post on Telegram, adding that Ukrainian forces were ready to deter any........

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