Could the war go nuclear? A drone has caused damage in Russia's capital city, Moscow. Meanwhile, people are still being killed in Ukraine's capital, Kyiv.
Russia on edge as drones reach Moscow
Predator to prey? The drones hit several buildings but only caused “minor” damage. Glossary
Drones - Drones are aircraft flown with no humans on board. They are used for many different purposes.
Russia - The largest country in the world by area. It has a population of 144 million people.
Ukraine - A country in Eastern Europe. It was invaded by Russia in February 2022.
Nuclear weapons - A bomb or other weapon that uses nuclear energy to cause a big explosion.