The Iranian Navy, (not IRGC Navy), has officially announced their seizure of the ST NIKOLAS tanker in the Gulf of Oman.
In the past, the majority, (if not all), vessel capture operations by Iran were conducted by the Islamic Revolutionary Guard Corps Navy.
The ST NIKOLAS (9524475); is carrying Iraqi oil.
Formerly known as the SUEZ RAJAN; she was previously seized by the US government for having transported a million barrels of Iranian oil in connection to a US company.
The owners of NIKOLAS, Empire Navigation, say the vessel has 19 crew members: 18 Filipino and 1 Greek (presumably the captain) - though there are also reports one holds US nationality.