According to the local governor, an armaments storage in a Russian town near the Ukrainian border caught fire on Wednesday.

The governor of Russia's Belgorod region announced on Telegram that "according to preliminary information an ammunition depot is on fire near the village of Staraya Nelidovka" around 20 kilometres (12 miles) from the Ukrainian border."

According to Vyacheslav Gladkov, the fire was extinguished, and there were no civilian casualties or damage to residential properties, while the cause of the fire was not known.

The governors of neighboring Kursk and Voronezh regions -- also close to the Ukrainian border -- reported that air defense systems went off during the night.

Kursk Governor Roman Starovoyt announced on Telegram, "There are no casualties or destruction," while Voronezh region Governor Alexander Gusev said their air defense system "successfully destroyed" a small reconnaissance drone without disclosing the origin of the drone.

Russia has regularly accused Ukrainian forces of carrying out attacks on its territory, saying that in reaction, Moscow's forces will increase attacks on Ukraine's capital.

Read more: Ukraine: Several villages in east captured by Russian forces

On Monday, a gasoline store in the Bryansk area, also bordering Ukraine, caught fire.

In early April,  a large fire erupted at an oil storage facility in Belgorod, barely two days after a series of explosions at an ammo stockpile took place in the same Russian territory bordering Ukraine.