Russia fights cross-border raid that Ukraine says is Russian opposition

An aerial view shows destructions in the frontline town of Bakhmut, amid Russia's attack on Ukraine, in Donetsk region, Ukraine, in this handout picture released on May 21, 2023. Press Service of the 93rd Kholodnyi Yar Separate Machanized Brigade of the Ukrainian Armed Forces/Handout via REUTERS

KYIV (Reuters) -Russia said on Monday it was battling a cross-border incursion by saboteurs who burst through the frontier from Ukraine, in what appeared to be one of the biggest attacks of its kind since the war began 15 months ago.

The governor of Russia's Belgorod region, Vyacheslav Gladkov, said a Ukrainian "sabotage group" had entered Russian territory in the Graivoron district bordering Ukraine and was being repelled.