Ukrainian troops appear to have pushed into Russian territory. What to know

Russian troops are battling to push back Ukrainian forces from the Kursk region on the third day of one of the largest cross-border incursions of the war, the Russian Defense Ministry said Thursday.

A ministry statement said the Russian military and border guards have blocked Ukrainian forces from pushing deeper into the region in southwestern Russia. It added that the army is attacking Ukrainian fighters trying to advance into the area from Ukraine’s Sumy region.

“Attempts by…