The death toll from Russia’s heavy bombardment of Ukraine’s capital this week has risen to 31 people, marking the deadliest single attack on Kyiv in a year, Ukrainian officials said on Friday.

KYIV, Ukraine (AP) — The Ukrainian capital Kyiv observed an official day of mourning Friday, a day after a Russian drone and missile attack on the city killed 31 people, including five children, and injured more than 150, officials said.

The strikes resulted in multiple explosions and fires at the targeted facilities, according to Ukraine’s military. The operation involved units from the Armed Forces of Ukraine, the Security Service (SBU),