The expert: I have not been so worried in many years

Oscar A Jonsson, PhD in Russian warfare, sees a new Russian invasion of Ukraine as more likely than in a long time.

The United States has said it has strong evidence of Russian plans for aggressive action against Ukraine.

In early December, the New York Times published information that Russia had 175,000 men on the border with Ukraine and that it had received credible plans for a new Russian invasion of Ukraine at the end of January.

- The troops that Russia has at the border are the troops you would need for a military invasion.

I am more worried about the situation than I have been for many years, says Oscar A Jonsson to SVT. 

Oscar A Jonsson believes that none of what has emerged from Friday's NATO meeting is likely to make Russia re-evaluate its possible plans.

"After Russia invaded Ukraine in 2014 and was met with rather symbolic restrictions, Russia reckons that NATO and the EU do not have the preparedness and willingness to take any stronger measures in the event of a new invasion," he says. 

- NATO says that it should support Ukraine in different ways, but at the same time says that Ukraine is a partner and not a NATO ally and that it will not send troops to Ukraine.

See Oscar A Jonsson's analysis of the situation in the video above