ST. PETERSBURG, June 29. /TASS/. Natural gas delivered over the second line of the Turkish Stream gas pipeline can flow through gas transmission systems of Bulgaria, Serbia and Hungary early in 2020, Chief Executive Officer of Gazprom Alexei Miller said on Friday.

"When the Turkish Stream will be commissioned with the design capacity, gas over the Turkish Stream can flow through gas transmission systems of Bulgaria, Serbia and Hungary early in 2020," Miller said. These countries made a decision to develop their gas transmission networks, he added.