SOUTH GATE, Calif.–A male student stabbed a female student at South East High School during a lunchtime argument today, and three other people were injured while breaking up the fight.

The female student was taken to a hospital in critical condition, according to county fire Inspector Matt Levesque. A total of five people–including the assailant–were hospitalized, he said.

Paramedics were sent to the school at 2720 Tweedy Blvd. about 11 a.m., Levesque said.

Monica Carazo of the Los Angeles Unified School District confirmed that the suspect is a male student at the school.

The suspect stabbed and critically injured a female student during a fight that broke out during lunchtime, according to LAUSD Superintendent John Deasy. A male student and a dean at the school intervened and were stabbed by the suspect, but suffered non-life-threatening injuries, Carazo said.

KCAL9 reported that the assailant was injured and was also among those hospitalized. Lt. Randy Brooks of the School Police Department said an officer was also injured–although he was not stabbed. Deasy said the officer suffered some type of back injury.

The school was on lockdown, Carazo said.