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The EBRD said it was raising its 2011 growth forecast for its zone from 4.2 to 4.6 percent.
"Growth prospects for the economies in the EBRD region have improved, but concerns are growing about the possible fallout from sovereign debt problems in some euro zone countries and inflationary pressures are emerging as a new risk," the bank said in a statement.
The London-based EBRD was formed in 1991 to help former communist nations in their transition to market economies. It tends to invest in private enterprises together with commercial partners across its zone.