British seized cargo of the Bulgarian merchant ship Varna according to a letter of the German naval attaché at Istanbul dated 20 January 1940

In his letter dated Istanbul, 20 January 1940 No. 650 g1. reported the German naval attaché to the Oberkommando der Wehrmacht Abteilung Ausland that the Bulgarian merchant ship Varna was stopped by a British torpedoboat, brought towards Malta where her cargo destined for Romania and Bulgaria was unloaded.

Source

Bundesarchiv. German Marineattaché for , Greece, Romania and Bulgaria 1939-1941. RM 12-II/459.