Three protesters were arrested Monday at Portland's downtown Immigration and Customs Enforcement facility where an occupy group has been camped out since June 17.

One person was arrested Monday morning, and two in the afternoon, said Robert Sperling, a Federal Protective Service spokesman, adding that two officers received minor injuries during one of the arrests.

Sperling said officers also deployed pepper spray and pepper balls after two of the people who were later arrested allegedly assaulted an officer.

The individuals arrested were believed to be crossing into federal property and trying to tear down a tape line outside the facility which was in place to mark federal property, he said.

A video posted Monday on Twitter shows at least one of the arrests.

DHS officers attempted to come into camp a human shield was formed and then this happened pic.twitter.com/79GA3BdTXr — John (@Johnnthelefty) July 9, 2018

The front of the facility remains open since homeland security officers reinstated normal operations at the building Tuesday.

A "no-climb" fence was erected July 2 around part of the building to enhance security and decrease the number of law enforcement needed around the facility, Sperling said.

Thomas Ngo, a spokesman for Portland's Bureau of Development Services, said the bureau issued a notice that the fence, which was built without permits, violates city code.

He said an inspection found the fence to be more then eight feet tall, which is a city structural code violation.

Complaints were made earlier that the fence was encroaching on the sidewalk, which is a public right-of-way, he said.

Ngo said an officer inside the building was notified of the violation. A formal letter will be sent to the property owner, who is required to respond within 10 days.

TO CLARIFY AN EARLIER TWEET: FPS dispatch placed an emergency call for service to BOEC regarding a priority assault. Two Portland Police officers responded to 4310 SW Macadam Ave. The officers arrived, determined there were no current life safety issues and left the scene. — Portland Police (@PortlandPolice) July 9, 2018

Portland Police tweeted Monday that two officers responded to an assault at the ICE facility location, but left upon determining there were no "current life safety issues."

Members of the Occupy ICE PDX media team did not immediately respond to requests for comment.

Jim Ryan of the Oregonian/OregonLive contributed to this report.

--Anna Spoerre