Ukrainian President Volodymyr Zelensky has introduced martial law, and urged people to remain calm in a brief video address on Thursday morning.

“Dear Ukrainian citizens, this morning President Putin announced a special military operation in Donbas.  Russia conducted strikes on our military infrastructure and our border guards.  There were blasts heard in many cities of Ukraine.  We’re introducing martial law on the whole territory of our country.  A minute ago I had a conversation with President Biden.  The US has already started uniting international support.  Today each of you should keep calm.  Stay at home if you can.  We are working.  The army is working. The whole sector of defense and security is working," Zelensky noted in his address

“No panic. We are strong.  We are ready for everything.  We will win over everybody because we are Ukraine,” the Ukrainian president noted.