The Chief Inspector of Constabulary, Tom Winsor, has told The Times that there are "cities in the Midlands where the police never go because they are never called."
In the article, he said that some minority communities are taking the law 'into their own hands'.
Chris Sims, chief constable of West Midlands Police, told The Times that areas with a high density of minority communities accounted for high volumes of calls to his force.
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A large tent has been put up around the area while investigations continue.
The kind gesture touched the hearts of many who shared and retweeted words of support for the officer on Twitter.
Two workers were forced into a back office as the robbers tried to force their way into a safe, police say.