Russia has issued a stark warning that UK support for Ukraine could trigger a nuclear confrontation . Ambassador Andrey Kelin pointed to the West’s backing of Ukrainian missile strikes on Russian territory as a dangerous escalation, which also comes as President Vladimir Putin pledged to launch more hypersonic missiles at Ukrainian targets, Knewz.com can reveal. Kelin warned that using Western missiles, such as ATACMS , against Russia could result in a "collision between the nuclear powers."