File No. 763.72/10328
The Secretary of State to the Consul General at Sofia ( Murphy )
Department informed that a Bulgarian officer under training was recently on German submarine U–104 while engaged in hostile operations. Also that Bulgarian officer cruised to the United States on the German U–53. Request of Bulgarian Government an urgent explanation of its action in placing its officers on enemy ships of war engaged in active aggression against the United States with which Bulgaria is not at war. Report by cable.