Officers in riot gear formed a line several officers deep, then moved in on demonstrators, arresting several who broke an order to keep moving.
Missouri State Highway Patrol Captain, Ron Johnson, believes those disrupting the community are from out of town.
“Our citizens and visitors have come here throughout the country are here to protest their thoughts,” said Johnson. “Their attitude hasn't changed. But what has grown is this element that has been out tearing up this community.”
National Guard units are now in the city protecting a police staging area but could be called on if things get worse.
Tensions in the predominately black community have been heightened since Michael Brown, an unarmed black teenager, was shot to death by a white police officer, Darren Wilson, last week.
An independent autopsy done by the Brown family revealed he was shot six times, including twice in the head.
Witnesses have said Brown had his arms up and was surrendering at the time. But a Forensic expert who worked on the autopsy said Monday that is still inconclusive.
Attorney General Eric Holder is heading to Ferguson Wednesday, as the Justice Department performs a third autopsy on Brown's body. The Ferguson-Florissant School District has canceled classes for the rest of the week because of the instability.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.