Bulgarian President Georgi Parvanov and his Greek counterpart Karolos Papoulias called for speeding up energy and cross-border cooperation.
Parvanov told a joint press conference that more active efforts would be given to work on the gas interconnector between Bulgaria and Greece.
The two neighbors signed in March the documents to start building the 160-km-long pipeline that extends from Komotini in northern Greece to Stara Zagora of Bulgaria.
Parvanov also said the two sides should intensify concerted efforts on a liquefied natural gas (LNG) terminal, which determined the way of gas delivery from countries like Azerbaijan.
Meanwhile, Parvanov told media that he had discussed with Papoulias on the opening of new border crossings, such as the Makaza check point, and the Rudozem-Xanthi, the Avren-Mirtiski and the Gorna Arda-Paranesti border crossings.
There are now five crossings along the 493-km border line between the two neighbors. Two of them were opened in 2010.