About a dozen protesters gathered Saturday at the California National Primate Research Center to voice their opinions on animal research. The protest was peaceful; no arrests were made.

The demonstration was led by 19-year-old University of Utah student Jeremy Beckham. The CNPRC is the last stop of a nationwide tour for Beckham, who has spent a week protesting outside each of the eight National Primate Research Centers this summer.

On Saturday evening, protesters gathered at the home of center director Dallas Hyde, who was not home. Neighbors called police, and the group dispersed peacefully. The CNPRC is continuing to operate in a state of heightened security as a precaution.

On Tuesday, activists held a press conference outside the center to announce that they were filing a complaint with the U.S. Department of Agriculture, which inspects the Primate Center, about treatment of animals at the facility. Center officials said that the allegations appeared to be based on a misinterpretation of figures in the center's annual reports to the USDA.

The center currently houses more than 4,700 non-human primates and conducts research in areas including HIV/AIDS, Alzheimer's disease, autism and asthma.