BELGRADE: Serbian President Aleksandar Vucic said on Sunday he had agreed a three-year gas supply contract in a phone call with Russian President Vladimir Putin. “I cannot speak about the price now, all details will be agreed with Gazprom,” Vucic told reporters. Serbia’s 10-year gas supply contract with Gazprom expires on May 31. Vucic also said that he had discussed with Putin expansion of gas storage space in the Balkan country.