A Russian regional official said on Wednesday that border guards in the Kursk region bordering Ukraine had come under fire.
"Yesterday, on April 5, they tried to fire mortars at the position of our border guards in the Sudzhansky district," said Roman Starovoit, the governor of the Kursk region. "Russian border guards returned fire... There were no casualties or damage on our side."
Russia last week accused Ukrainian forces of carrying out an air strike against a fuel depot in the Russian city of Belgorod near the border with Ukraine, but a senior Ukrainian official denied responsibility.
(Reporting by Reuters; Editing by Conor Humphries)