Ukraine has condemned a fresh wave of Russian attacks that killed one person and injured 23 others overnight, as peace talks with Russia and the United States resumed in Abu Dhabi.

Ukraine’s Foreign Minister Andrii Sybiha described the strikes as “brutal” and said the attacks hit not only civilians but also the peace process. He said the assault showed Russia was not serious about negotiations.

According to officials, one person was killed and four others were wounded in drone attacks on the capital Kyiv. In Kharkiv, Ukraine’s second-largest city, 19 people were injured during heavy overnight strikes, local authorities said.

Kyiv Mayor Vitali Klitschko said three of the injured were taken to hospital. He also said critical infrastructure was damaged, leaving about 6,000 buildings without heating as temperatures remain below freezing.

President Volodymyr Zelensky said Russia mainly targeted energy facilities during the attacks. In Kharkiv, Mayor Ihor Terekhov said a maternity hospital and a shelter for displaced people were damaged.

The attacks came as delegations from Ukraine, Russia and the US held a second day of talks in Abu Dhabi, the first known trilateral discussions since Russia launched its full-scale invasion in 2022.

Ukrainian Defence Minister Rustem Umerov said the talks focused on ways to end the war and move toward a lasting and dignified peace. However, Ukrainian officials said the key issue of territory remains unresolved.

Russia currently controls about 20 percent of Ukrainian territory, including parts of the eastern Donbas region. Moscow wants Ukraine to give up more land, a demand Kyiv has rejected.

With inputs from BBC