Zelenskyy: 'Yesterday, the Russians struck a private house in Kharkiv with a drone. They killed three young children. Their father was also killed. My sincere condolences to the family and loved ones. The mother was hospitalized – the woman is pregnant and suffered burns.This morning, a city hospital in Zaporizhzhia was attacked by a drone. Overnight in the Sumy region, six people were injured in a drone attack, including children. Sadly, one person was killed. '