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In page West Berlin:
"While East and West Berlin became formally separate jurisdictions in September 1948, and while there were travel restrictions in all other directions for more than a decade, freedom of movement existed between the western sectors and the eastern sector of the city. However, time and again Soviet and later East German authorities imposed temporary restrictions for certain persons, certain routes, and certain means of transport. Gradually the eastern authorities disconnected and separated the two parts of the city.[citation needed]
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