A new gas pipeline from Russia to Greece may go through the territory of Bulgaria, the Russian Presidential Aide Yuri Ushakov said.

"There is ongoing work on the gas delivery project from Russia to Greece and Italy through third countries. The pipeline will be laid on the bottom of the Black Sea and then through the territory of one of the coastal countries, this is obviously Bulgaria," Sputnik cited Ushakov as saying.

On May 27, Russian President Vladimir Putin will pay an official visit to Greece.