Authorities arrested a 19-year-old after they arrived to a party with underage drinkers in Fallbrook early Monday morning.
According to the San Diego County Sheriff's Department, Severo Perez, 19, was arrested just after midnight at his parents' home on Rainbow Glen Road.
Deputies said when they arrived to the home, at least 50 people were fighting and minors were drinking alcohol and smoking marijuana.
A number of the juveniles were "severely intoxicated." Personnel with the North County Fire Department responded to evaluate the juveniles and release them to their parents.
Perez, who is the son of the homeowner, was arrested and faces charges of violating the Social Host Ordinance and contributing to the delinquency of minors.