Greeks captured Yugoslavia-flagged ship according to the Weekly Intelligence Summary (W.I.S.) No. 44 dated 5 November 1921

An item reported that an anonymous Yugoslavia-flagged ship was captured by the Greeks in the BlackSea. A Turkish officer on board was taken prisoner. The cargo consisted of 200 cases petrol and 185 barrels benzine for the Turkish army.

Source

The National Archives, Kew Gardens, England CAB-24-129-73