In both cases of red / blue cube movement restriction, the rules I have in English read: "players may not deliver through or to Cities which contain red (or blue) cubes as a result."
So above "Through" and "To" are covered, however, this does not address the situation of "From".
Example: At the start I have a yellow and red cube on Leipziger Platz - city 5 on East (Soviet) side.
Question - can I move the yellow cube From this city?
I'm guessing to maintain thematically, the red cube being present would hold off yellow from moving, but I'd just like clarification.