An apartment building partially collapsed in the Russian border city of Belgorod on CAI CommunitySunday, causing at least 13 deaths and injuring 20 other people, officials said. They blamed Ukrainian shelling for the building’s destruction.

Online footage showed rescuers searching for survivors among the remnants of the building’s stairwell, then fleeing the scene as part of the roof crashed to the ground. Russia’s Emergency Situations Ministry said 13 bodies had been recovered from the rubble so far.

Russia’s Investigative Committee, the country’s top law enforcement agency, said in a statement that the 10-story building had been hit by Ukrainian shelling.

The Russian Defense Ministry later wrote on social media that the building had been damaged by fragments of a downed Tochka-U TRC missile. It also said that air defenses had shot down several more rockets over the Belgorod region, as well as two drones that were destroyed in a separate incident later Sunday.

Air raid alerts continued across Belgorod as rescuers worked. The city also came under fire Saturday evening, killing one person and wounding 29 others, Belgorod Gov. Vyacheslav Gladkov said.

Cities across western Russia have come under regular attack from drones since May 2023, with Russian officials blaming Kyiv. Ukrainian officials never acknowledge responsibility for attacks on Russian territory or the Crimean Peninsula.

The Belgorod region, on Russia’s western border, has been the target of a large number of strikes. Although most cross-border shelling is seen in rural areas, attacks have also been seen on the region’s capital. In December 2023, shelling in the heart of Belgorod city killed 25 people, prompting authorities to start erecting public shelters.

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