US Presidential Envoy Keith Kellogg has described Russia’s overnight assault on Kyiv as one of the largest since the invasion began, warning that such strikes undermine peace efforts.

Trump’s envoy said Russia conducted the second-largest bombardment of Kyiv since the full-scale invasion started, deploying over 600 drones and 31 missiles against the Ukrainian capital.

“The targets? Not soldiers and weapons but residential areas in Kyiv—blasting civilian trains, the EU & British mission council offices, and innocent civilians. These egregious attacks threaten the peace that @POTUS is pursuing,” Kellogg wrote.

The 28 August overnight strike saw Russian forces launch 629 air attack weapons across Ukraine, according to Ukrainian officials. Direct hits were recorded at 13 locations, with debris falling at 26 additional sites.

In Kyiv, at least 18 people died in the attack, including four children. The city declared 29 August a day of mourning.

The bombardment targeted civilian infrastructure rather than military installations, hitting residential buildings, transportation networks, and diplomatic facilities. European Union and British mission offices were among the structures damaged in the assault.

Multiple European nations condemned the Russian bombardment, while the European Union and Britain announced they would summon Russian diplomatic representatives for official protests.

The attack represents a significant escalation in Russia’s targeting of civilian areas in the Ukrainian capital, with Kellogg’s assessment marking it as the second-most intensive assault on Kyiv since February 2022.