This is the 16296th most frequent Korean word.
비밀경찰로부터
"From the secret police."
In this context, '비밀경찰로부터의' specifies the origin of the warning received.
비밀경찰로부터의 경고를 받았습니다.
I received a warning from the secret police.
In this sentence, '비밀경찰로부터' indicates the origin or source from which the subject received the information.
비밀경찰로부터 정보를 입수했습니다.
I obtained information from the secret police.
Here, '비밀경찰로부터' indicates the entity being fled from.