LONDON- Russia's Gazprom GAZP.MM Chief Financial Officer Andrei Kruglov said on Thursday that the TurkStream's gas pipeline costs estimates have risen to $7 billion from earlier projections of $6 billion.

(Reporting by Dmitry Zhdannikov; Writing by Polina Nikolskaya; Editing by Vladimir Soldatkin) ((Polina.Nikolskaya@thomsonreuters.com;))