Russia-Ukraine crisis: What is going on?

An instructor trains members of Ukraine's Territorial Defense Forces, volunteer military units of the Armed Forces, in a city park in Kyiv, Ukraine, Saturday, Jan. 22, 2022. Picture: AP Photo/Efrem Lukatsky

In the last 24 hours, the British foreign office and the US state department ordered family members of staff working at their embassies in Ukraine to leave the country.

It comes amid beliefs among Nato countries of a significant risk that Russian president Vladimir Putin will launch a full-scale invasion of Ukraine.