By Anton Kolodyazhnyy, Steve Holland and Lidia Kelly MOSCOW/WASHINGTON (Reuters) -U.S. President Donald Trump's offer to join proposed Ukraine-Russia peace talks triggered a flurry of diplomacy as powers from Europe to the Middle East sought a possible path out of the deadliest conflict in Europe since World War Two.

US President Donald Trump said he was open to attending the potential peace talks between Russia and Ukraine in Turkey on Thursday, as the US ramps up pressure on Moscow and Kyiv to bring an end to the three-year conflict.