Russia’s second-largest city, St. Petersburg, and the surrounding Leningrad region were hit by a large-scale Ukrainian drone attack overnight Saturday, with strikes targeting an oil terminal and nearby port infrastructure, according to Russian and Ukrainian officials.

St. Petersburg Governor Alexander Beglov said the city of approximately six million residents faced what he called a “large-scale” drone attack that damaged the city’s oil terminal. He said no casualties were reported and that emergency crews had completed response operations.

Leningrad Governor Alexander Drozdenko said Ukrainian drones also struck the port of Vysotsk, located about 105 miles northwest of St. Petersburg on the Baltic Sea. The port is a major transportation hub for oil, grain, coal and liquefied natural gas.

Drozdenko added that Russian air defenses intercepted 72 drones across the Leningrad region. While several communities sustained minor damage, he did not disclose whether the strike affected operations at the Vysotsk port.

In a message posted on Telegram, Ukrainian President Volodymyr Zelenskiy said: “Ukraine’s defence forces struck port oil infrastructure that generates revenue for Russia’s war, and also hit Kronstadt, an important military target more than 850 km (528 miles) from Ukraine’s state border.”

Russian officials did not confirm any attack on Kronstadt, the major naval base near St. Petersburg that Ukraine previously targeted during an earlier strike in June.

Separately, reports said that Russian President Vladimir Putin’s superyacht was relocated amid concerns it could be targeted as Ukraine expanded its long-range drone strikes.

Ukraine has significantly expanded its campaign against Russian energy infrastructure this year, with repeated attacks contributing to fuel shortages in several parts of the country.

On Friday in the Leningrad region town of Gatchina, a Reuters witness observed long lines of motorists waiting at gas stations, while some locations had completely run out of fuel.

One queuing resident, who gave his name as Gennadiy, told Reuters: “Standing in queues after work isn’t exactly fun.”

“And then, in a couple of days, I’ll have to stand in queues again, because I’ll run out of gas again.”

In separate attacks, officials in Russia’s Bryansk region and the Russian-installed administration in Crimea reported that one person was killed in each region by drone strikes, while several others were injured.

Farther south, authorities in Russia’s Pskov region said air defense systems destroyed more than 30 drones overnight. Officials reported limited damage and several injuries, including at a factory in the town of Velikiye Luki.