US President Donald Trump has called on Russia to stop "destabilising" Ukraine and other countries and end support for "hostile regimes" such as those in Syria and Iran.

Speaking in the Polish capital Warsaw, Mr Trump urged Russia to "join the community of responsible nations".

The Kremlin rejected his comments.

The US leader has travelled to Hamburg for the G20 summit, where he will meet Russian President Vladimir Putin for the first time.

In Warsaw, Mr Trump addressed a large, cheering crowd from the monument to the 1944 uprising in the city, on Krasinski Square.

He hailed Poland as an example of a country ready to defend Western freedom.(BBC)