Ukraine is working on a homegrown air defense system to rival the US-made Patriot system, according to the commander in chief of its army.

Russia’s military on Tuesday said it would retaliate against Ukraine after Kyiv attacked Russian regions by firing six US-made ATACMS ballistic missiles, six UK-made Storm Shadow cruise missiles and launching one of the biggest drone attacks to date.

In the must-see video above, at least three people were killed as Russia targeted central Kyiv in a missile attack in the early hours of Saturday, January 18, the city’s mayor said.