Ukrainian President Volodymyr Zelensky said that Russia's December 13 attack on the country's energy sector was one of the largest during the entire period of the conflict.
"One of the largest strikes on our energy sector," Zelensky wrote on his Telegram channel.
He also called on the world for a "strong response" and said that the Armed Forces of Ukraine needed more Patriot systems.
The Russian military launched a massive strike on Ukrainian energy facilities in response to Ukraine's attack on the airfield in Taganrog with ATACMS missiles, the Russian Defense Ministry said.
According to the ministry, the goals of the strike were achieved, all targets were hit.
In the morning of December 13, explosions thundered in Kyiv, Odessa, Khmelnytskyi, Ivano-Frankivsk and Lviv regions of Ukraine. The attack triggered emergency power outages and interruptions in water supplies.
Five of Ukraine's nine nuclear reactors reduced their capacity due to morning missile attack, the IAEA says.
The Russian Defense Ministry stressed that the strikes were only aimed at military and energy facilities in Ukraine, as well as their associated infrastructure.