Dec 27 - The Ukrainian capital Kyiv came under a massive Russian attack early on Saturday, with explosions sounding in the city, air defences in operation and the Ukrainian military saying missiles were being deployed.

The Russian action took place two days before a meeting Ukrainian President Volodymyr Zelenskiy says he is due to hold in the United States with President Donald Trump to work out details of an accord for settling the nearly four-year-old war pitting Russia against Ukraine.