Alain Salas, a teacher’s assistant and coach at John C. Fremont High School, was arrested by the FBI on Monday.

Members of the SAFE Team (Sexual Assault Felony Enforcement) took the 40-year-old into custody on suspicion of violating section 288.3 of the California Penal Code, which prohibits contact with minor with the intent to commit a sexual offense.

He is accused of contacting a 15-year-old girl both online and in person, with alleged sexual contact at the school, according to the L.A. Times.

Superintendent John Deasy has said in interviews with multiple media outlets that they first found out about the investigation when the FBI notified the LAUSD on Monday.

Salas has worked at Freemont since 2006 as a teacher’s assistant for special education students, and as a coach for the girls’ softball and volleyball teams.

His arrest comes just days after nearby Miramonte Elementary experienced a second arrest of one of their teachers, which prompted the school to temporarily replace its entire staff.

Held without bail in downtown LA, Salas is expected to appear in court today to face formal charges from the Los Angeles County District Attorney’s Office.