Two teachers have been charged with buying alcohol for underage students on a camping trip at San Clemente Beach that authorities earlier said included one of the instructors having sex with a student.

Melody Suzanne Lippert, 38, of Covina and Michelle Louise Ghirelli, 30, of West Covina, were each charged Wednesday with a misdemeanor count of contributing to the delinquency of a minor, according to a statement from the Orange County District Attorney’s office.

Neither is facing sexual assault charges, despite initial allegations by investigators that there may have been inappropriate contact between one of the instructors and a teen on the trip.

According to prosecutors, Lippert organized the unauthorized trip, sending a group text message inviting Ghirelli and five male high school students. During the trip, which lasted from Dec. 27 to 29, authorities allege the two teachers distributed alcohol to the boys.

Officials at the Covina-Valley Unified School District learned of the trip and reported it to the Orange County Sheriff’s Department, who arrested the instructors earlier this month. District officials notified parents, and indicated that the two women were placed on leave.

Ghirelli was arrested on suspicion of having sex with an underage student during the trip. However, prosecutors determined that there was “insufficient evidence to prove beyond a reasonable doubt” that a sexual assault occured.

However, prosecutors cautioned that their investigation is ongoing, and more charges could be filed later.

If convicted of the current charges, the two face a maximum sentence of a year in jail. Both have been released on bond, according to Orange County Sheriff’s records.