Mystery Code

A robbery was committed at a large bank. The only clue discovered by the police was a crumpled piece of paper found beneath the air vent through which the robbers had entered the bank. On this piece of paper, the following code appeared:

IJEF UIF NPOFZ XJUI MBSSZ VOUJM MBUFS.

HBUIFS BU BJSQPSU GSJEBZ.

As a result of the information contained in the coded message, the police quickly apprehended the robbers.

What did the message say?

(answer)