Doctors are assessing an outbreak of the winter vomiting bug at the Birmingham Heartlands hospital. It's after they closed all wards to visitors over the weekend.
They are advising people to contact patients using the hospital telephone syetem.
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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.