Kyiv resident and mother-of-three Olena Gnes has shared the sobering way she's taught her children how to protect themselves in the event of a Russian attack.
Currently taking shelter in the basement of a building in Ukraine's capital, Gnes said her children – the youngest who is just 5 months old – can differentiate between a bomb explosion and a missile.
"Children hear the explosions and I'm telling them if this is like 'boom, boom,' this is far away, so don't be afraid," she told the BBC.
"If you hear 'ssshhhhh', that means this is the missile flying and this is the most dangerous sound," she said.
"We have like the words, if I say, 'run,' we run to the shelter. If I say, 'hide,' we just lie down to the nearest wall and cover our heads with our hands and keep our mouths open."