Updated March 30: Revised to include 10th arrest.

A 10th high school athlete has been charged with sexual assault in a hazing scandal at a San Antonio-area school.

Alejandro Ibarra, 18, was arrested Wednesday.

Seven juveniles and two other adults also have been charged over allegations dating back as far as 2014, La Vernia Police Chief Bruce Ritchey said this week.

All 10 arrestees have at some point been athletes at La Vernia High School, which has about 1,000 students. Ritchey said the hazing primarily involved the football team, but the basketball and baseball teams were also involved to a lesser degree.

"It's a black eye for the city," Ritchey told the San Antonio Express-News. "What I'm concerned with right now is providing the help and healing for those victimized."

Two more students taken out in handcuffs at La Vernia High School @KABBFOX29 @News4SA pic.twitter.com/fHA9QtdIgb — Breanna Barrs (@breannabarrs) March 27, 2017

One victim's mother, who did not want to be identified, told KABB-TV that the victims were held down in the locker rooms while a lookout watched the door for coaches.

They would "stick various items up their rectum including Coke bottles, deodorant bottles, steel pipes, baseball bats," she told the station.

According to an arrest warrant affidavit, Ibarra is accused of holding down a 16-year-old football teammate and sexually assaulting him with the end of a tank of carbon dioxide in November, the Express-News reported.

Dustin Norman, 18, and Robert Olivarez Jr., 17, were arrested Monday in connection with the same incident, according to the affidavit, which said the act was part of an "initiation" to the varsity team.

The victim made an outcry about the assault on March 21, police said.

Robert Olivarez Jr. (Wilson County Sheriff's Office)

Police have not released the names of the seven juveniles who were charged and declined to specify the nature of the alleged sexual assaults.

La Vernia police confirmed all the students arrested and all of the victims are male, KABB reported.

The juveniles were arrested last week and have been released to their parents. Ibarra, Norman and Olivarez have been released from the Wilson County Jail in Floresville after posting bail.

Several "persons of interest" remain under investigation, but Ritchey declined to say how many or whether they are past or present students.

The allegations have rocked the farming town of about 1,000 residents about 20 miles east of San Antonio.

"The travesty of the events occurring at the La Vernia High School have crushed the spirit of our community," school Superintendent Jose Moreno wrote in a post on the La Vernia ISD Facebook page.

High school administrators and athletic directors "are implementing additional protocols to provide students a clear path of communication to report a concern, receive counseling and know that their voices will be heard while maintaining their privacy," Moreno said.

The Associated Press contributed to this report.