Ukraine's top military commander says its forces are still defending a small area of territory inside Russia that it captured almost a year ago.
In August 2024 Ukraine launched a surprise incursion into the Kursk region, capturing more than 1,000 sq km (386 sq miles) of Russian land.
Ukraine's commander-in-chief Oleksandr Syrsky said 10,000 Russian troops are attempting to drive his forces back.
While Russia has repeatedly insisted it had recaptured the entire region, Syrsky said on Sunday that Ukraine is still holding around 90 sq km (56 sq miles) in the Kursk region.
Speaking to reporters on Sunday, Syrsky vowed to increase the "scale and depth" of strikes on Russia.
