President Vladimir Putin said Friday that Russia will continue to test and start mass-producing the hypersonic ballistic missile that it fired at Ukraine Thursday.

Russia fired a hypersonic intermediate-range ballistic missile at the Ukrainian city of Dnipro on Thursday in response to the U.S. and UK's allowing Kyiv to strike Russian territory with advanced Western weapons,

The Kremlin on Friday said Russia's launch of an experimental ballistic missile against Ukraine should be understood as a warning to the West, as NATO Secretary General Mark Rutte convened a key meeting to discuss the implications of the strike.