Ukraine's President Volodymyr Zelenskiy speaks during a joint press conference with German Defence Minister Boris Pistorius (not pictured) after talks, amid Russia's attack on Ukraine, in Kyiv, Ukraine Jun 12, 2025. REUTERS/Thomas PeterUkraine's President Volodymyr Zelenskiy speaks during a joint press conference with German Defence Minister Boris Pistorius (not pictured) after talks, amid Russia's attack on Ukraine, in Kyiv, Ukraine Jun 12, 2025. REUTERS/Thomas PeterUkrainian forces have stopped Russian troops advancing in the northeastern Sumy region and are now battling along the border to regain control, President Volodymyr Zelensky said. And the maximum depth at which the fighting takes place is 7 km from the border," Zelensky said. He also dismissed Moscow's claims that Russian troops had crossed the administrative border of the Ukrainian central region of Dnipropetrovsk.