KYIV, Ukraine—Russia launched a massive missile and drone attack on cities across Ukraine, killing at least 30 people and allegedly sending a warhead through Polish airspace in one of the biggest barrages of the war.

Ukrainian President Volodymyr Zelensky said Russia launched around 110 missiles on Friday morning. The majority were shot down, according to Ukrainian officials, but damage was nonetheless widespread. Schools, apartment buildings and a maternity hospital were all hit. Casualties were reported in Kyiv, Kharkiv, Odesa, Dnipro, Zaporizhzhia and Lviv—the six largest Ukrainian cities not under Russian occupation.