On 8 July, teachers and professors of the Higher University of San Andrés (UMSA), joined two days later by university students, went on strike demanding increased wages. The police dispersed the demonstration concentrated in the Plaza Murillo with rifle and machine gun fire, leaving 3 dead and 11 wounded. On 17 July, the windows of the university were found destroyed, having been stoned the night before by drunk MNR members including the Minister of Agriculture Julio Zuazo Cuenca. The gesture galvanized university students who organized in La Paz, rallying the city's population to their side. During one of these rallies, Bergel Camberos, a student from the "Pedro Domingo Murillo" Industrial School, was shot by police, heightening the crowd's animosity against the government. In a bid to disperse the growing crowds, President Villarroel brought the "Loa" 4th Infantry Regiment and the Bolívar 2nd Artillery Regiment into the city. The situation quickly devolved with the army clashing with the student protesters, causing 10 casualties. On 19 July, an infantry column descended on La Paz with orders to occupy some corners of the city.