A day before his first meeting with Vladimir Putin, Donald Trump has called Russia "destabilising" and said the West is in a battle with those who want to "destroy" it.

Mr Trump, speaking in Warsaw, said the US was "working with Poland in response to Russia's actions and destabilising behaviour".

He also called on Moscow to end its support for "hostile regimes".

The US President is meeting Mr Putin on the sidelines of G20 meeting in Hamburg on Friday.

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"We urge Russia to cease its destabilising activities in Ukraine and elsewhere and its support for hostile regimes including Syria and Iran," said Mr Trump.


"And to instead join the community of responsible nations in our fight against common enemies and the defence of civilisation itself."

President Trump also conceded that Russia probably played some part in hacking during last year's US election.

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He told reporters: "I think it was Russia, but I think it was probably other people and/or countries, and I see nothing wrong with that statement.

"Nobody really knows. Nobody really knows for sure."

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When pushed by a female reporter to definitively say that Russia interfered in the 2016 election, the President refused to "be specific".

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American intelligence agencies have stated that Russia was behind the hacking.

Several probes are ongoing in the US into the claims, and into possible collusion between Russia and President Trump's team.

The Kremlin said they "disagreed" with his description and regretted "a lack of understanding between Russia and the US about expectations for their future relations".

In another speech, near a monument to the Warsaw Uprising against the Nazis, President Trump also painted the issues of terrorism, immigration and totalitarian governments as a fight for Western civilisation.

He said: "The fundamental question of our time is whether the West has the will to survive... Do we have enough respect for our citizens to protect our borders?

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"Do we have the desire and the courage to preserve our civilization in the face of those who would subvert and destroy it?"

Mr Trump received a rapturous reception from those gathered in the Polish capital, with many chanting his name.

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Sky News' Moscow Correspondent John Sparks said he believed Mr Trump's criticism of Russia was "significant".

"He has shown his cards. He has said that Russian military actions are basically unacceptable," he said.

"That's a change from Donald Trump. The American government seems more unified now on Russia - and that's what the Poles wanted to hear."

Kremlin spokesman Dmitry Peskov said he hoped that Mr Trump's first meeting with Russia's President Putin would allow them "to get acquainted and finally understand the true approach of each other to bilateral relations".