UK Prime Minister Boris Johnson says the "evidence is pretty clear" that Russia is planning an invasion of Ukraine.
Johnson cuts short a trip to North West England as he says there are "signs that show that there are serious preparations" being made by Russia.
Russia denies plans to invade Ukraine, despite massing 100,000 soldiers on Ukraine's borders and a reported 30,000 close to the Belarus-Ukraine border.
More than a dozen countries, including the UK and the US, have urged their citizens to leave Ukraine amid warnings of an "imminent" invasion.
German Chancellor Olaf Scholz is set to meet Ukrainian President Volodymyr Zelensky in Kyiv later as part of efforts to defuse tension.
Russia wants assurances Ukraine will never be allowed to join Nato - but the alliance's members have opposed this.
https://www.bbc.co.uk/news/live/world-60372815