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.

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.

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,