Israel has issued a warning against travel to Ukraine as fears grow that Russia may be planning to invade its neighbour. The relatives of diplomats are to be evacuated from Ukraine, the Israeli Foreign Ministry said late Friday. Israeli citizens have also been asked to register via a link. The US government said on Friday that it considers a Russian incursion into Ukraine possible before the close of the Winter Olympics in China on February 20. Moscow denies having any such plans, but has massed over 100,000 troops along Ukraine’s borders.