Ukraine’s military says it is responding to a Russian attack in the northeastern Sumy region, an area close to the border between the two countries. According to Ukrainian officials, fighting is ongoing, with forces attempting to repel what they describe as a new Russian incursion. Russia has not publicly commented in detail on the reported clashes.

The developments on the battlefield come as diplomatic efforts aimed at ending the war continue in the United States. Russian officials have denied that there are plans for three-way negotiations involving Russia, Ukraine, and the U.S., despite the presence of diplomats in Miami.

Russian envoy Kirill Dmitriev said he held talks with U.S. representatives on Saturday, describing the discussions as “constructive,” with further meetings continuing on Sunday. The Kremlin, however, has expressed skepticism about the prospects for progress, saying it does not believe proposed changes from Ukraine or European countries would significantly alter the current U.S.-led peace proposals.

Diplomats remain in Miami as talks continue, highlighting the contrast between ongoing diplomatic engagement and continued military activity on the ground. Independent verification of the situation in the Sumy region remains limited, and details from both sides have been restricted.