Obama condemns Russian 'dark tactics' in Ukraine

US President Barack Obama: "We stand together now and forever, for your freedom is ours"

US President Barack Obama has condemned Russian "aggression" in Ukraine.

Speaking in Warsaw to mark 25 years since the fall of communism in Poland, he hailed Polish democracy as a beacon for neighbouring Ukraine.

"How can we allow the dark tactics of the 20th Century to define the 21st?" he said.

Earlier Mr Obama met Ukraine President-elect Petro Poroshenko, and pledged support for plans to restore peace to the country.

Mr Obama called Mr Poroshenko a "wise selection" to lead Ukraine, and said the nation could become a vibrant, thriving democracy if the world community stood behind it.

       Mr Obama said Poland and America stood together

Leaders from across Central and Eastern Europe came to the event

Earlier Mr Obama met Mr Poroshenko, and called him a "wise selection" for leader of Ukraine

Mr Obama is now in Brussels for the G7. Activists there have been protesting against wealth inequality.

Mr Poroshenko, a billionaire sweet manufacturer, was elected in May and will be inaugurated as Ukraine's president on Saturday.

Mr Obama pledged $5m (£3m) of military assistance to Kiev including body armour and night-vision goggles.

The aid follows $18m promised since early March for food, clothes, radios and other equipment.

Mr Obama has now arrived in Brussels for a meeting of the G7 major industrial nations, the first since Russia was removed from the G8 in protest over its annexation of Crimea in March.

He is expected to meet Russian President Vladimir Putin in France on Friday, during 70th anniversary commemorations of the D-Day landings in Normandy.

Symbolism

The BBC's Adam Easton in Warsaw says Mr Obama chose to come to Poland for its symbolic value.

In his speech, the US president said that Poland's long struggle against occupation and tyranny was mirrored in the plight of Ukraine today.

"We will not accept Russia's occupation of Crimea or its violations of Ukraine's sovereignty," Mr Obama said.

"As we've been reminded by Russia's aggression in Ukraine, our free nations cannot be complacent in pursuit of the vision we share - a Europe that is whole and free and at peace."

Later German Chancellor Angela Merkel threatened Russia with further sanctions if Moscow failed to rein in separatists in eastern Ukraine.

"It is decisive that President Putin use his influence to get the separatists to refrain from violence and intimidation, hand over their weapons and stop the occupations," she said in a speech to parliament.

Meanwhile, on the ground in Ukraine, separatist rebels have taken two military bases in the eastern region of Luhansk as fighting continues near the rebel-held town of Sloviansk.