Ukraine bars Russian men from entering country

Ukraine will not allow Russian men aged 16-60 into the country during martial law, the president has said.

An exception would be made for "humanitarian cases" such as those travelling to funerals.

Martial law has been imposed in 10 regions including those bordering Russia until 26 December.

Russia timeline: Key players, meetings and investigation details

By NBC News

As special counsel Robert Mueller continues his inquiries into Russia collusion in the 2016 election, new information continues to be added to the timeline of facts.

NBC News has gathered information starting as early as 2004 to help make sense of the convoluted series of events around President Donald Trump and his inner circle. The timeline will be updated as new information develops.

Sort by player or read the full timeline.