At least 20 people have been killed after Russia launched a massive missile attack on cities across Ukraine, according to officials. In the capital, Kyiv, at least seven people were killed in a rare daytime attack. The city’s mayor reported that a children’s hospital was hit by the missile strike and was being evacuated.

In the central Ukrainian city of Kryvyi Rih, the head of the military administration said at least 10 people were killed, while three were killed in the eastern town of Pokrovsk. Ukrainian President Volodymyr Zelensky, who is visiting Poland, stated that Russia fired about 40 missiles at targets across the country.

Mr. Zelensky, who is scheduled to travel to the US for this week’s NATO summit in Washington, said Russia had “massively attacked” Ukraine. “Different cities: Kyiv, Dnipro, Kryvyi Rih, Sloviansk, Kramatorsk. More than 40 missiles of various types. Residential buildings, infrastructure, and a children’s hospital were damaged,” he said.

Plumes of smoke were seen across Kyiv, while video posted on social media showed the destruction inside and outside the Okhmadyt children’s hospital. It is unclear if anyone inside was injured, but Mr. Zelensky said people were trapped under the rubble. The number of people injured at Okhmadyt hospital remains unclear.

Kyiv’s mayor, Vitaliy Klitschko, told Reuters the bombardment was the worst attack on the capital since the war began. Elsewhere, Oleksandr Vilkul, head of the military administration in Kryvyi Rih, posted on Telegram that at least 10 people were killed and 31 wounded following the attack on the city, with 10 seriously injured.

Kryvyi Rih, Mr. Zelensky’s hometown, has been repeatedly attacked by Russia since it launched its full-scale invasion of Ukraine in February 2022.

The Russian bombardment coincides with Indian Prime Minister Narendra Modi’s arrival in Moscow for a two-day state visit to Russia, where he is scheduled to hold talks with President Vladimir Putin at the Kremlin.