In attendance will be Bosnia and Herzegovina Presidency chairman Nebojsa Radmanovic and Presidents Georgi Parvanov of Bulgaria, Traian Basescu of Romania, Alfred Moisiu of Albania, Filip Vujanovic of Montenegro, Branko Crvenkovski of Macedonia and Boris Tadic of Serbia.
Russian President Vladimir Putin will be a special guest as countries in the region import Russian gas.
Greece will be represented by a deputy minister.
European Commission representatives will follow the summit.