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.

Russian missile and drone attacks overnight on Ukraine’s capital city killed at least 13 people, including a 6-year-old boy, and wounded 132 others, authorities said Thursday. A 5-month-old girl was among 14 children wounded,