Sunk with all 11 hands by gunfire from U-38 (Liebe) - NW Tory Island - 9th March 1940
The Leukos was fishing in the company of British trawlers and she may have positioned herself between these fleeing trawlers and the U-boat in the vain belief that her status as a neutral would be respected. Alternatively the Leukos might have attempted to ram the U-38. Alternatively, as the Leukos was on the British registry until 1928, U-38 might have old information and thought that she was British, falsely flying the tricolour
Read the wikipedia article