Ukraine’s military used drones to target Russian oil refineries Wednesday, damaging a site in the Ryazan region.

Pavel Malkov, regional governor in Ryazan, said an attack at an oil refinery there caused a fire and some injuries, according to preliminary reports.

Officials in the Leningrad region said Russian air defenses shot down a Ukrainian drone as it approached a refinery and that there was no damage.

The attacks were part of a wave of Ukrainian drones launched into Russian territory for the second consecutive day.

Alexander Gusev, governor of the Voronezh region that borders Ukraine, said Wednesday that air defenses shot down more than 30 Ukrainian drones overnight.

On Tuesday, Ukrainian drones damaged two Russian fuel sites.

Ukrainian officials said a Russian missile hit a residential building in the central city of Kryvyi Rih Tuesday, killing at least three people and injuring at least 38 others.

Oleksandr Vilkul, head of the Kryvyi Rih’s military administration, said the strike on the building was one of three missiles that hit the city, which is the hometown of President Volodymyr Zelenskyy and a frequent target of Russian attacks.

Zelenskyy expressed condolences on social media and thanked rescuers for providing assistance.

“Every day, our cities and villages suffer similar strikes. Every day, Ukraine loses people to Russian evil,” he wrote. “There can be no pause, not for a day, a week, let alone a month, in support for simply defending lives, for saving people from terror.”

Some information for this report was provided by Agence France-Presse and Reuters