As gunfire, shelling and fighting continues above the ground, those below take shelter as Russian troops advance in Ukraine.
The northeastern city of Kharkiv, the country’s second-biggest, Kherson in the south and the port city of Mariupol have faced heavy attacks on the seventh day of the invasion.
More than 2,000 Ukrainian civilians have been killed so far during Russia’s invasion, according to the country’s emergency service.
Away from the air strikes people are taking refuge in basements, metro stations and underground shelters.
Doctors are helping patients in the basements of hospitals and perinatal centres as newborn babies arrive.
Kharkiv, a city of 1.4 million, has faced attacks from the air, including a paratrooper assault on a military hospital overnight.
Children and their families have been forced to take shelter as Russia continues its march to the capital.
Ukrainian President Volodymyr Zelenskky expressed outrage after Russia hit a TV tower in Kyiv, killing a family of five, and damaged the site of the nearby Babi Yar Holocaust memorial.
As Ukrainians shelter from air raid sirens Pope Francis has been asked to urge Vladimir Putin to open humanitarian corridors, Ukraine’s deputy prime minister says.