The announcement was made by Russian Prime Minister Vladimir Putin just as the United Nation's Food and Agriculture Organization began an emergency meeting to deal with the wheat shortage.
Meanwhile, food riots broke out in the Mozambique capital, Maputo.
Although agricultural officials and traders insist that the situation is not as bad as it was three years ago, some fear that scenes similar to those that played out in Mozambique could spread to other countries and cities.
The FAO reported a rise in inquiries from member countries concerned over a possible repeat of the 2007-08 food crisis.