Protesters are forming a 'blockade' infront of the entrances of the Council House in Birmingham as the anual budget meeting takes places.
The protests are against the £625m worth of cuts to welfare and public services.
More top news
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.