Philadelphia police made several arrests as police clashed with Antifa protesters at a "Blue Lives Matter" rally on Saturday.

Hundreds of protesters and counter-protesters gathered downtown to demonstrate support for law enforcement and against police brutality, stop-and-frisk policies and mass incarceration, according to CBS News.

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Pictures and video posted to social media showed police arresting several people and overturned bikes blocking a street while onlookers chanted slogans.

Some chanted "Who do you serve?" and other messages directed at officers making the arrests, which began after some demonstrators were blocking traffic.

People arrested at the Antifa counter-protest to #BlueLivesMatter march which is on its way to Logan Square @WHYYNews @TayImanAllen has more pic.twitter.com/1aPNPeuT1j — Darryl C. Murphy (@darrylcmurphy) August 25, 2018

It was unclear from the video how many people were arrested, and Philadelphia police did not immediately respond to a request for comment from The Hill.