British military facilities and equipment in Ukraine and beyond could become legitimate targets for Russian strikes if Kiev continues to use UK-supplied weapons for attacks on Russian territory, Foreign Ministry spokeswoman Maria Zakharova has warned.

The comments come amid rapidly deteriorating relations between Moscow and London, and a day after Ukrainian forces reportedly used British-French Storm Shadow/SCALP missiles in a strike on Donetsk that wounded at least eight civilians, including two children.

“We have repeatedly warned that the response to Ukrainian strikes using British weapons against Russian territory could be directed against any British military facilities and equipment in Ukraine and beyond,” Zakharova said during a press briefing on Thursday.

Those responsible for attacks on Russian civilians will be punished, she added, warning that their “accomplices and instigators” will also face consequences.

Zakharova accused successive British governments of pursuing a long-term objective of inflicting a so-called “strategic defeat” on Russia, and urged “all residents of the United Kingdom to think about the inevitable, catastrophic consequences of the hostile steps taken by their own authorities.”

The spokeswoman called on the British government to “immediately, decisively and unequivocally” abandon its aggressive policies that threaten to push the conflict “to a fundamentally new level.”

Earlier this week, Britain approved the transfer of classified technology needed to help Ukraine assemble Storm Shadow/SCALP cruise missiles domestically.

Kremlin spokesman Dmitry Peskov responded by accusing Britain of “participating in this war on the side of the Kiev regime” and warning that Russian forces are gathering intelligence on sites involved in producing missiles and other military equipment in Ukraine in order to destroy them.

Russian Foreign Minister Sergey Lavrov also warned last week that Moscow has “every right to regard the proudly proclaimed direct involvement of British missile forces in strikes against Russia as participation in the war, with all the consequences that entails.”