Many parts of Ukraine were experiencing blackouts after a massive wave of Russian strikes on March 22 targeted Ukraine's energy infrastructure, killing at least four people, hitting the country's largest dam, and temporarily severing a power line at the Zaporizhzhya nuclear plant.
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President Volodymyr Zelenskiy said the assault involved 150 drones and missiles and appealed again to Ukraine's allies to speed up deliveries of critically needed ammunition and weapons systems.
As the full-scale invasion neared the 25-month mark, Zelenskiy aide Mykhailo Podolyak denied recent reports that the United States had demanded that its ally Kyiv stop any attacks on Russia's oil infrastructure as "fictitious information."
"After two years of full-scale war, no one will dictate to Ukraine the conditions for conducting this war," Podolyak told the Dozhd TV channel. "Within the framework of international law, Ukraine can 'degrease' Russian instruments of war. Fuel is the main tool of warfare. Ukraine will destroy the [Russian] fuel infrastructure."
The Financial Times quoted anonymous sources as saying that Washington had given "repeated warnings" to Ukraine's state security service and its military intelligence agency to stop attacking Russian oil refineries and energy infrastructure. It said officials cited such attacks' effect on global oil prices and the risk of retaliation.
The southern Zaporizhzhya region bore the brunt of the Russian assault that hit Ukraine's energy infrastructure particularly hard on March 22, with at least three people killed, including a man and his 8-year-old daughter. There were at least 20 dead and injured, in all.
Ukraine's state hydropower company, Ukrhydroenerho, said the DniproHES hydroelectric dam on the Dnieper in Zaporizhzhya was hit by two Russian missiles that damaged HPP-2, one of the plant's two power stations, although there was no immediate risk of a breach.
"There is currently a fire at the dam. Emergency services are working at the site, eliminating the consequences of numerous air strikes," Ukrhydroenerho said in a statement, adding that the situation at the dam "is under control."
However, Ihor Syrota, the director of national grid operator Ukrenerho, told RFE/RL that currently it was not known if power station HPP-2 could be repaired.
Transport across the dam has been suspended after a missile struck a trolleybus, killing the 62-year-old driver. The vehicle was not carrying any passengers.
"This night, Russia launched over 60 'Shahed' drones and nearly 90 missiles of various types at Ukraine," Zelenskiy wrote on X, formerly Twitter.
"The world sees the Russian terrorists' targets as clearly as possible: power plants and energy supply lines, a hydroelectric dam, ordinary residential buildings, and even a trolleybus," Zelenskiy wrote.
Ukraine's power generating company Enerhoatom later said it has repaired a power line at the Russian-occupied Zaporizhzhya nuclear plant, Europe's largest.
"Currently, the temporarily occupied Zaporizhzhya NPP is connected to the unified energy system of Ukraine by two power transmission lines, thanks to which the plant's own needs are fulfilled," the state's nuclear-energy operator wrote on Telegram.
Besides Zaporizhzhya, strikes were also reported in the Kharkiv, Dnipropetrovsk, Vinnytsya, Khmelnytskiy, Kryviy Rih, Ivano-Frankivsk, Poltava, Odesa, and Lviv regions.
Kharkiv, Ukraine's second-largest city, has been left completely without electricity by intense Russian strikes that also caused water shortages.
"The occupiers carried out more than 15 strikes on energy facilities. The city is virtually completely without light," Oleh Synyehubov, the head of Kharkiv regional military administration, wrote on Telegram.
In the Odesa region, more than 50,000 households have been left without electricity, regional officials reported. Odesa, Ukraine's largest Black Sea port, has been frequently attacked by Russia in recent months.
In the Khmelnitskiy region, the local administration reported that one person had been killed and several wounded during the Russian strikes, without giving details.
Energy Minister Herman Halushchenko called it "the largest attack on the Ukrainian energy industry in recent times."
Despite the widespread damage, Prime Minister Denys Shmyhal said the situation remained under control, and there was no need to switch off electricity throughout the country.
"There are problems with the electricity supply in some areas, but in general, the situation in the energy sector is under control, there is no need for blackouts throughout the country," Shmyhal wrote on Telegram.
Ukrenerho also said that it was receiving emergency assistance from its European Union neighbors Poland, Romania, and Slovakia. Ukraine linked its power grid with that of the EU in March 2022, shortly after the start of Russia's invasion.
Ukraine's air force said its air defenses downed 92 of 151 missiles and drones fired at Ukraine by Russia in the overnight attack.
"Russian missiles have no delays, unlike aid packages for Ukraine. 'Shahed' drones have no indecision, unlike some politicians. It is critical to understand the cost of delays and postponed decisions," Zelenskiy wrote, appealing to the West to do more for his country.
"Our partners know exactly what is needed. They can definitely support us. These are necessary decisions. Life must be protected from these savages from Moscow."
Zelenskiy's message came as EU leaders were wrapping up a summit in Brussels where they discussed ways to speed up ammunition and weapons deliveries for the embattled Ukrainian forces struggling to stave off an increasingly intense assault by more numerous and better-equipped Russian troops.
A critical $60 billion military aid package from the United States, Ukraine's main backer, remains stuck in the House of Representatives due to Republican opposition, prompting Kyiv to rely more on aid from its European allies.