European Commissioner for Neighbourhood and Enlargement Negotiations Oliver Varhelyi started his visit to Belgrade today at Elektromreže Srbije Company (EMS). Energy security is one of the main topics of Commissioner Varhelyi`s visit and a priority on a European level, especially after the Russian aggression against Ukraine. During the visit to EMS, Commissioner and Ministers Dubravka Đedović and Tanja Miščević were presented with the current state of implementation of the Trans-Balkan Electricity Corridor, in the presence of the EU and German Ambassadors to Serbia, as well as representatives of KfW Bank.