Recent social media videos show Ukrainian forces using drones similar to IEDs. The drones sit next to roads and then strike Russian military vehicles when they pass.

A Russian drone struck a multi-storey apartment building in the northeastern Ukrainian city of Sumy early on Thursday, killing nine people and injuring 13, including a child, President Volodymyr Zelenskiy said.

The war between Russia and Ukraine, which enters its fourth year next month and shows no signs of ending, has killed more than 10,000 Ukrainian civilians, according to the United Nations.