Kyiv, Ukraine (CNN) — Kyiv was bombarded overnight by Russia’s second-biggest aerial attack since its full-scale invasion of Ukraine, with at least 18 people killed, including four children, according to officials.

Buildings belonging to the European Union and the British Council were damaged in the strikes into Thursday, causing both the EU and the United Kingdom to summon the top Russian diplomats in their capitals.

CNN’s Anna Chernova, James Frater and Char Reck contributed to this report.

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