According to the UN Under-Secretary-General for Political and Peacebuilding Affairs Rosemary DiCarlo, the United Nations is worried about Ukrainian strikes on communities deep into Russia and closing its border with Ukraine.

Last August, Amnesty International published a statement in which it accused the Ukrainian military of going against international humanitarian law protocol of international armed conflict, due to their bases being located in civilian-dense areas and institutions like schools and hospitals.

Read more: Russia's security services report rise in Ukrainian attacks in borders

During a UN Security Council meeting, DiCarlo expressed concern regarding the "possible impact on civilians of the shelling of Russian border communities and drone attacks deep inside Russia, including Moscow."

The Secretary-General reaffirmed that civilian attacks were deemed unlawful and indefensible under international law.

Last month, Ukraine was accused of war crimes after the shelling of the city of Gorlovka left a firefighter dead.

Also last month, Ukraine targeted the border town of Kurchatov, which has a nuclear power plant similar to Chernobyl, prompting Moscow to accuse the collective West of "nuclear terrorism."

A residential building was hit in the town after the attack, with the governor of the Russian Kursk region announcing at the time that "fortunately, none of the residents were injured."

Today, the Russian Defense Ministry announced that Russia successfully thwarted a Ukrainian drone attack targeting the Bryansk and Kaluga regions. According to the statement, Russia destroyed three unmanned aerial vehicles (UAVs) during the overnight attack.

"This night, an attempt by the Kiev regime to carry out terrorist attacks by aircraft-type unmanned aerial vehicles was thwarted," the Russian ministry said, adding that "two UAVs were destroyed by air defense systems over the territory of the Bryansk Region. Another Ukrainian drone was detected and destroyed by air defense systems above the Kaluga Region."

This type of attack is not new as two Ukrainian drones near Crimea were intercepted by the Russian Defense via electronic warfare, downing them into the water over the Black Sea 40 kilometers (24.8 miles) northwest of the Crimean peninsula, according to the Russian Defense Ministry released earlier on Tuesday.