Ukraine crisis: Obama says 'we are imposing sanctions'
17 March 2014 Last updated at 15:48 GMT
President Obama has outlined sanctions against a number of officials from Russia and Ukraine.
The move follow Sunday's referendum in Crimea, in which election officials say 97% of voters backed breaking away from Ukraine and joining Russia.
The individuals targeted by the sanctions are seen as having played a key role in the referendum, which Kiev, the US and EU regard as illegal.