Ukrainian President Volodymyr Zelenskyy has warned his country of possible increased Russian attacks over the upcoming Christmas holiday season

urging his people to “pay attention to air raid alarms, help one another and look out for one another”.

 Zelenskyy said that he had met his top military commanders to review the situation and that his government is “preparing for various scenarios of action by the terrorist state. And we will respond”.

“With the holiday season fast approaching, the Russian terrorists could again step up their activities,” Zelenskyy said.

“They have no regard for Christian values or any values for that matter.” The Ukrainian leader also issued an unusually sharp warning to Russia.

Switching to Russian, Zelenskyy warned that “citizens of Russia must clearly understand that terror never goes without a response”.