Two male students were arrested for a fight on Monday, Sept. 16, at Landmark Middle School in Moreno Valley, California, which left another student in critical condition.

According to a news release from the Riverside County Sheriff’s Department, deputies responded to Landmark Middle School about 1 p.m., The Los Angles Times reported.

A video of the fight at school posted on social media shows two 13-year-old students punching another 13-year-old student, Diego. Diego’s head hits a concrete pillar as he falls to the ground. The student who threw the first punch struck him again and then ran away.

Diego suffered serious injuries and was taken to a local hospital, the Riverside County Sheriff’s Department on Tuesday reported that he remained hospitalized in critical condition. 

Riverside County sheriff’s officials said that on Monday night, two other students was arrested and booked into Riverside County Juvenile Hall on suspicion of assault likely to cause great bodily injury in connection with the attack, according to CBS Los Angeles.

KTLA 5 reported that according to classmates, Diego had recently been bullied, including on social media.

At Wednesday’s meeting with sheriff’s deputies and school resource officers, hundreds of parents of Landmark Middle School students said that they have been angry over the Moreno Valley Unified School District’s handling of bullying cases, according to KTLA 5.

Landmark administrators and deputies assured parents that they are investigating the incident in-depth: interviewing students, first responders, looking at security cameras, and students’ videos of the assault to make sure it will not happen again.

Crisis counselors are now on hand for students and staff, anti-bullying and anti-violence banners hang across campus.

The district said that additional behavioral specialists have been hired and it is working with more mental health experts and services this year.