Why some kids in Ukraine go to school underground

It's been more than three years of war for people living in Ukraine, after Russia invaded the country in 2022.

The conflict has a huge impact on the lives of people living there - including children. But some things carry on - like going to school.

The BBC's reporter Olga Malchevska grew up in Ukraine, and went back to visit a school in the city of Zaporizhzhia which has been specially built to keep children safe.