KYIV, UKRAINE -- Ukrainian forces have secured 鈥渃ombat control鈥� of areas where Russian troops entered the northeastern Kharkiv region earlier this month, Ukrainian President Volodymyr Zelenskyy said.

鈥淥ur soldiers have now managed to take combat control of the border area where the Russian occupiers entered,鈥� Zelenskyy said in his nightly video address on Friday evening.

Zelenskyy鈥檚 comments appeared to be at odds with those made by Russian officials.

Viktor Vodolatskiy, a member of Russia鈥榮 lower house of parliament, said Russian forces now controlled more than half of the town of Vovchansk, three miles (five kilometres) inside the border, Russian state news agency Tass reported Friday.

Vovchansk has been a flashpoint for fighting since Russia launched an offensive in the Kharkiv region on May 10.

Vodolatskiy was also quoted as saying that, once Vovchansk was secured, Russian forces would target the cities of Sloviansk, Kramatorsk and Pokrovsk in the neighboring Donetsk region.

No independent confirmation of the claims was immediately possible.

Russia鈥檚 Kharkiv push appears to be a coordinated new offensive that includes testing Ukrainian defenses in the Donetsk region further south, while also launching incursions in the northern Sumy and Chernihiv regions. Russian President Vladimir Putin has said the Kremlin鈥檚 army is attempting to create a 鈥渂uffer zone鈥� in the Kharkiv region to prevent Ukrainian cross-border attacks.

The city of Kharkiv, which is the capital of the region of the same name, is about 20 kilometres (12 miles) from the Russian border. Moscow鈥檚 troops have in recent weeks captured villages in the area as part of a broad push, and analysts say they may be trying to get within artillery range of the city. Ukrainian authorities have evacuated more than 11,000 people from the region since the start of the offensive.

The Russian push is shaping up to be Ukraine鈥檚 biggest test since Moscow鈥檚 full-scale invasion in February 2022, with outnumbered and outgunned Ukrainian forces being pressed at several points along the about 1,000-kilometre (620-mile) front line that snakes from north to south in eastern Ukraine.

Ukraine鈥檚 problems have been mounting in recent months as it tries to hold out against its much bigger foe, and the war appears to be at a critical juncture.

Morton reported from London.