Russian President Vladimir Putin has warned his Ukrainian counterpart, Petro Poroshenko, that he will implement "protectionist measures" if Ukraine signs an agreement for closer ties to the EU.
However, Mr Putin also indicated that he would welcome any proposals to de-escalate the situation in the east of Ukraine, where there have been bloody clashes between Ukrainian forces and pro-Russian separatists.
More top news
David Cameron is facing growing pressure for the UK to take in more of the many thousands of migrants fleeing to Europe.
China has put on its biggest display of military might in a parade to commemorate victory over Japan in World War Two.
Hungarian Prime Minister Viktor Orban is to meet with European Union leaders in Brussels today to discuss the migration crisis.