A Ukrainian drone attack on the city of Nizhnekamsk, located in an energy-rich Tatarstan region of central Russia, killed at least a dozen people and wounded 39 more, according to a local press service statement issued Monday.

Over 1,000 kilometers (620 miles) from the Russian-Ukrainian border, the region has many major oil refineries that Kyiv has targeted in recent strikes as both sides increase long-range attacks on infrastructure.

The United Nations said such attacks have led to a jump in civilian casualties in Russia and Ukraine.

Unspecified industrial and civilian targets had been hit in Monday's strike, Radmir Belyayev, the mayor of Nizhnekamsk, said in a statement on Telegram.

The Ukrainian strikes on refineries have led to some fuel shortages and reduced Russia's oil-refining capacity.

Russia has also regularly fired missiles, glide bombs and drones hitting civilian areas in Ukraine and causing thousands of civilian casualties, according to the United Nations.

Kyiv: Air campaign aims to bring Putin to negotiating table

Ukrainian President Volodymyr Zelenskyy said the campaign aims to force Russian President Vladimir Putin into negotiations to end the more than 4-year-old full-scale invasion of Ukraine.

"We do deliver entirely justified responses, and every Russian strike will be met with our response. Russia's war will be felt more and more at their own home — in Russia," Zelenskyy said late Sunday in a social media post.

Ukraine's air force said Russia fired 126 drones in its overnight attack.

The Russian Defense Ministry said it shot down 456 Ukrainian drones fired overnight. The ministry, however, does not include how many drones or missiles reach their targets or how many were intercepted in the Tatarstan region.

Near the front line in Ukraine, a Russian artillery strike killed five people in a village in the northeastern Kharkiv region, Ukrainian officials said.

"On August 10, Russian forces carried out a massive artillery strike on the residential area of the village of Bugaivka in the Chuguiv district. Various houses were destroyed as a result of the enemy attack. Five people were killed," the regional prosecutor's office said in a statement on Telegram.

Edited by: Elizabeth Schumacher

Don't let the algorithm hide the news. If you rely on our team for trusted reporting, please take a moment to select us as your Preferred Source on Google by clicking here and hitting the "star" or "preferred" button, so you'll always see our verified news first.