A California substitute teacher has been arrested on suspicion of molesting four girls in a classroom in Santa Ana.

Police said that Peter Morales, 69, taught in the Santa Ana Unified School District for 18 years before he stepped away from a regular teaching gig to become a substitute.

The alleged victims told investigators that Morales touched them inappropriately at Adams Elementary in separate incidents.

“Each victim was molested individually and at different times throughout the day,” the Santa Ana Police Department said in a statement.

The four students were all ages 8 and 9. Investigators say they believe there may be more victims.

Morales posted a $100,000 bail, police said.

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[Featured image: Peter Morales/Santa Ana Police Department]