A 13-year-old boy was arrested for making online threats against Mountain View Middle School in Moreno Valley after a social media post featuring a weapon photo sparked concern among parents and students. The Riverside County Sheriff's Department responded to multiple reports received on Sunday evening, leading to the boy's identification and subsequent arrest on suspicion of making criminal threats. Investigators confirmed the weapon image was sourced from the internet, and authorities believe the boy acted independently without any further threats to the school. Additional police presence was established on campus to ensure safety following the incident. Sheriff officials emphasized the importance of reporting suspicious activities and thanked the community for their quick response. The identity of the minor has not been disclosed due to his age.