Updated 4:26 p.m.
Santa Monica police have arrested two teenagers over a recorded classroom fight between a student and a teacher.
Sgt. Jay Moroso says an 18-year-old from Santa Monica High School was arrested Friday on suspicion of threatening a school official, battery, marijuana possession and possessing a box cutter on campus.
A 16-year-old was arrested on suspicion of battery against a school employee.
Names and details aren't being released but a county sheriff's website says 18-year-old Blair Moore remains jailed.
A video showed teacher Mark Black struggling with a student on Friday and pinning him to the floor. Black's on leave while the school district investigates.
A message seeking comment from the district superintendent wasn't immediately returned.
Santa Monica's school superintendent has apologized for comments she made about a popular science teacher she placed on leave after cellphone videos showed him fighting with a student.
The Los Angeles Times reports Monday that Superintendent Sandra Lyon acknowledges public concern that she failed to immediately address the conduct of the students involved. You can see Lyon's entire letter attached below.
Lyon also said her comment reflected "pre-judgment" of teacher Mark Black.
On Friday Lyon said the videos were "utterly alarming" and pledged support for the student's family. They show Black wrestling with an unidentified student, pinning him to the floor.
Lyon's comments raised the ire of parents, some of whom defended Black and praised him for intervening.
School board member Oscar de la Torre said Saturday that the incident arose from a conflict over drug use.