At least 13 people have been arrested in San Francisco at a protest against another tuition hike at University of California schools. On Wednesday, protesters gathered outside a meeting where UC Regents are considering a proposal to raise average tuition eight percent, or over $800. The Regents approved a 32 percent tuition hike one year ago. One police officer pulled a gun on the protesters, while others used pepper spray to disperse the crowd. The Regents are set to vote on the tuition hike today.