862.20210/1110: Telegram
The Ambassador in Brazil (Caffery) to the Secretary of State
[Received 11:52 a.m.]
935. Rio police last night arrested several important Germans among whom were Albrecht Gustav Engels (Alfredo of CEL group) and Herbert von Heyer (Humberto of CEL group). Police is expected to round up the remaining individuals in the radio rings within next 24 hours with our guidance. It will be necessary to furnish police confidentially some little of the evidence contained in intercepted messages if these men are to be held in permanent custody. The Brazilian authorities themselves have no evidence against them. I repeat that these individuals are the principal agents who have been telegraphing the movement of planes, ships, et cetera to Germany. If we can hold them we can probably cripple the whole German espionage setup here.
Please inform FBI immediately.