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
Warning in force for ice across many northwestern areas.
Maurice Wrightson smashed into rocks rather than attempt the corner when his brakes failed descending a precarious mountain pass.
There were scenes of panic as Oxford Circus tube and the surrounding area were evacuated after police received reports of gunshots.