Lincolnshire Police say there were no arrests during two demonstrations in Lincoln yesterday.
Members of the group the East Anglian Patriots were protesting against a proposed mosque in the city. A counter demo also took place supported by members of the council.
A 'significant number' of police officers were on standby.
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Six Polish men were found at the two businesses, some living at sites, they are thought to have been paid around £1 an hour.
Tahir Mahmood was detained by Police as he was attempting to climb into the roof space of an out-building at his family’s home.
Family man Mr Javeed was the owner of Digbeth business Direct Source 3 and was shot and killed on February 3.