In Dniprovskyi District in Kyiv, the alleged remains of a 3M22 Zircon hypersonic cruise missiles were found.
Russia claims the 3M22 Zircon can travel at Mach 9, or about 6,900 mph which makes it hard to shoot down. It is one of the newest cruise missiles, designed for both naval and land targets, the Russian navy took into service in 2023….
https://en.wikipedia.org/wiki/3M22_Zircon