Is it normal for police to patrol the city on a work day?

I saw a security guard parked in front of a mosque while people were inside for some type of event, and I saw multiple sections of street blocked off by police cruisers several kilometres down, and at the place where we were about to park, I saw a police car coming out of the drive way. Either our city now has extra funding for police officers, or they project a potential threat to public safety nearby, and are taking precautionary measures.

Is it normal for police to patrol the city on a work day?
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