Russia's stock markets have dropped about 10% and its currency has fallen to its lowest point ever against the dollar and the euro because of the crisis in neighbouring Ukraine.
The Moscow Exchange fell about 10% in the first hour of trading today, although it later recovered slightly.
The rouble, already down nearly 10% this year, fell below 50 against the euro for the first time. It was trading below 36.4 to the dollar, also a record.
More top news
A second police officer has died after he and a colleague were shot as they scuffled with a suspect in Florida.
Thousands of demonstrators have marched through Boston in opposition to a right-wing rally in the city which was eventually cut short.
Some 1,000 counter-protesters blocked 500 neo-Nazi demonstrators as they tried to march to the site of the death of Hitler ally Rudolf Hess.