Moscow is trying to repulse Kyiv’s biggest cross-border ground offensive since Russia’s invasion.

Moscow has rushed reinforcement troops and military equipment to regions bordering Ukraine where Kyiv’s forces have staged a surprise incursion.

The Russian government also implemented emergency security measures in the regions — Bryansk, Belgorod and Kursk.

Russian tanks have taken up firing positions against Ukrainian mobile armored groups in the Kursk region, the Russian Defense Ministry said, according to a Tass report. The additional military supplies also include rocket launchers and aviation units, according to reports.