Poland to do its best for peace in Europe, says gov't spokesperson

Mateusz Morawiecki, the Polish prime minister, will meet in Kyiv on Tuesday with the Ukrainian president and prime minister, a government spokesperson wrote on Twitter on Saturday.

"Poland supports Ukraine in actions designed to prevent Russia's aggression," Piotr Mueller wrote.

"We will do our best to maintain peace in Europe," he stated.

Russia has already deployed around 100,000 troops on its border with Ukraine, prompting fears that it intends to invade its western neighbour.

Late last year, Russia demanded US and Nato guarantees that Ukraine will not become a Nato member in return for withdrawing the forces, and threatened military steps should the demands remain unmet.

Nato countries have refused the demands, saying that Ukraine is an independent state which has the right to choose its alliances alone.

Ukraine and western countries believe that Russia's military build-up at the border with Ukraine is aimed at building pressure on Kyiv and the capitals of states which have offered their support to Ukraine. According to military experts and western governments, there is a real threat of Russian aggression.