University of California, Davis Police pepper-sprayed passive students on the UCD campus on Friday. Video of a tense standoff between police and Occupy demonstrators at the University of California, Davis shows an officer using pepper spray on a group of protesters who appear to be sitting passively on the ground with their arms interlocked - action the university chancellor called \"chilling to us all\". Several videos, which were posted on YouTube, were shot Friday as police moved in on a tent encampment on the campus. In the video, an officer displays a bottle before spraying its contents on the seated protesters in a sweeping motion, walking back and forth. Most of the protesters have their heads down, but at least one is hit in the face. Some members of a crowd gathered at the scene scream and cry out, then chant, \"Shame on You,\" as the protesters are arrested. The officers retreat minutes later with helmets on and batons drawn. \"Yesterday was not a day that would make anyone on our campus proud,\" UC Davis chancellor Linda Katehi wrote in response to the pepper-spraying video. It\'s not clear from the video what agency the officer who used the pepper spray represents. Officers from UC Davis and other UC campuses as well as the city of Davis responded to the protest, according to Annette Spicuzza, UC Davis police chief. Davis is about 80 miles north of San Francisco. Spicuzza told the Sacramento Bee that police used the pepper spray after they were surrounded. Protesters were warned repeatedly beforehand that force would be used if they didn\'t move, she said. \"There was no way out of that circle,\" Spicuzza said. \"They were cutting the officers off from their support. It\'s a very volatile situation.\" The tents went up on Thursday, and protesters were warned on Friday morning that they had until 3 p.m. to take them down or they would be removed.