-- Court Police in Government Plaza arrested a member of

this afternoon after he attempted to pass through a security checkpoint along with three other protesters, said Chris Hapkmeyer, a member of the group.

Tyler Henderson was arrested and charged with obstructing government operations, Hapkmeyer said.

A message left for Bob Patterson, chief of the court police, was not immediately returned.

According to Hapkmeyer:

Henderson and three others entered Government Plaza at about 1 p.m. with the intention of filing paperwork in the City Clerk's office necessary to appear before the City Council during its next meeting.

The clerk's office is on the 9th floor. Some of the protesters were wearing t-shirts emblazoned with the group's logo.

As the group attempted to pass through the security checkpoint in front of the elevators, the security officer said that only two could go up at a time, Hapkmeyer said.

When Henderson asked why not, the officer told him to "shut up and stop asking him questions," Hapkmeyer said. When Henderson calmly asked again, the officer arrested him, Hapkmeyer said.

with about 20 others earlier this month after refusing to vacate a public park.

Henderson's companions took a video of the arrest and its aftermath, though the footage does not capture the seconds prior to the arrest.

Hapkmeyer said the video was not edited. "I only pulled the camera out once the arrest began. I obviously was not expecting anything like this to occur," he said.

Updated at 3:38 p.m. to include video.