Russia’s border region with Ukraine is shelled again, officials say.

A village in the Bryansk region of Russia near the border with Ukraine was shelled early Tuesday, the third straight day of security incidents in the region as both sides ramp up fighting ahead of the expected Ukrainian counteroffensive.

The early morning attack caused a fire but no casualties, the regional governor, Aleksandr V. Bogomaz, said on the Telegram messaging app. He said the Ukrainian military was behind the attack on the village, which is less than five miles from the border, without elaborating. These claims cannot be independently verified.

The attack was the latest in a series of attacks on the border region that Russia has used as a staging ground for airstrikes, rocket launches and other attacks on Ukraine. The Ukrainian military says the area is also increasingly being used to launch drone strikes. Ukraine usually does not claim credit for attacks on Russian territory, but the leader has said he has the right to attack targets used to attack Ukrainian cities and towns.

On Sunday, Mr. Bogomaz said four people in the area were killed by Ukrainian attacks from across the border. Several rockets hit the village of Suzemka, which is a few miles from the border with Ukraine’s Sumy region, the governor said at the time.

On Monday, an explosion caused a freight train to derail in the area. Mr. Bogomaz said the explosion was caused by an unknown explosive device. The country’s rail service blamed “unauthorized human interference” for causing the locomotive to catch fire.

As of Tuesday morning, train services on the line have been restored, the Russian railway company said on Telegram. About 100 meters of railroad tracks, or about 330 feet, will need to be re-laid, according to the company.

Ukraine has previously targeted Bryansk, including sending special forces over the border in March to destroy an unmanned observation tower. Also in March, partisans claiming to fight for Ukraine made armed attacks on villages in the region, briefly taking control, and leading to emergency measures from the Kremlin.