Sign up now for FREE unlimited access to Reuters.com Register Western governments are increasingly concerned about deepening economic ties between Turkey and Russia, warning of the growing risk that Turkey could be hit with punitive retaliation if it helps Russia avoid sanctions, the Financial Times reported on Saturday. On Friday, Russian President Vladimir Putin and Turkish President Tayyip Erdogan agreed to boost cooperation in transport, agriculture, finance and construction. read more Six Western officials told the FT they were concerned about the deal. Sign up now for FREE unlimited access to Reuters.com Register Reporting by Maria Ponnezhath in Bengaluru Editing by Frances Kerry Our Standards: The Thomson Reuters Trust Principles.