Right-wing groups and counter protesters clashed in several states during demonstrations on Saturday, prompting police to get involved.

Confrontations ensued between right-wing groups and anti-fascist and Black Lives Matter protesters in Georgia, Michigan and Oregon after growing tensions sparked from months of protests over racial injustice and police brutality, Reuters reported.

In Kalamazoo, Mich., the alt-right organization Proud Boys held a rally in support of police and faced off with the anti-fascist Michigan People’s Defense League and others.

As the clashes mounted, police worked to disperse the crowd, and Kalamazoo Public Safety said in a statement obtained by Reuters that officers made several arrests. CNN affiliate station WOOD reported that the demonstrators were “punching, kicking and even pepper-spraying one another.”