This question already has an answer here:
In a recent MSNBC interview, Donald trump said this:
"Paris is no longer the same city it was. They have sections in Paris that are radicalized and the police refuse to go there. They're petrified. ... We have places in London and other places that are so radicalized that the police are afraid for their own lives"
This question is similar to Are there officially pronounced "no-go" Islamic zones in France?, however different in that Trump never claims these sections are official. He also claims that "police refuse to go there", not that they're officially refused entry. He claims these places exist in "Paris, London, and other places".
If this is true then certainly there'd be statements or statistics by police mentioning these areas. Is this true?