Greek tankers had advance warning of a threat to shipping before Iranian forces seized a Turkish-controlled suezmax in the Gulf of Oman on Thursday.

The 159,000-dwt Advantage Sweet (built 2012), carrying a Chevron crude cargo, was boarded by troops and taken to Iran in an apparent response to the US seizure of a Greek-controlled tanker carrying suspected Iranian crude.

Security company Ambrey said Iran’s seizure was in line with warnings received from the Greek Ministry of Shipping and Island Policy earlier in the week.