Ukrainian president Petro Poroshenko has signed a free-trade agreement with the European Union.
Georgia and Moldova also signed the deal, in a move Russia is likely to oppose.
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The launch of a medium-range missile took place around 5.20am Seoul time, off the country's east coast, an official said.
The world-famous theoretical physicist described the US presidential candidate as a "demagogue" to Good Morning Britain.
Cincinnati Zoo's director stood by the decision to shoot dead a 17-year-old gorilla after a toddler accidentally entered his sanctuary.