KYIV — Russia broke an energy truce brokered by U.S. President Donald Trump after just four days on Tuesday, hitting Ukraine’s power plants and grid with more than 450 drones and 70 missiles.

“The strikes hit Sumy and Kharkiv regions, Kyiv region and the capital, as well as Dnipro, Odesa, and Vinnytsia regions. As of now, nine people have been reported injured as a result of the attack,” Ukrainian President Volodymyr Zelenskyy said in a morning statement.

The Russian strike occurred half-way through a truce on energy infrastructure attacks that was supposed to last a week, and only a day before Russian, Ukrainian and American negotiators are scheduled to meet in Abu Dhabi for the next round of peace talks.  

The attack, especially on power plants and heating plants in Kyiv, Kharkiv and Dnipro, left hundreds of thousands of families without heat when the temperature outside was −25 degress Celsius, Ukrainian Energy Minister Denys Shmyhal said.

“Putin waited for the temperatures to drop and stockpiled drones and missiles to continue his genocidal attacks against the Ukrainian people. Neither anticipated diplomatic efforts in Abu Dhabi this week nor his promises to the United States kept him from continuing terror against ordinary people in the harshest winter,” said Andrii Sybiha, the Ukrainian foreign minister.

Last Thursday, Trump said Putin had promised he would not bomb Ukraine’s energy infrastructure for a week. Zelenskyy had said that while it was not an officially agreed ceasefire, it was an opportunity to de-escalate the war and Kyiv would not hit Russian oil refineries in response.

“This very clearly shows what is needed from our partners and what can help. Without pressure on Russia, there will be no end to this war. Right now, Moscow is choosing terror and escalation, and that is why maximum pressure is required. I thank all our partners who understand this and are helping us,” Zelenskyy said.