Sprawling allegations of abuse against cheerleaders reached Tennessee on Monday in a case that escalates the accusations facing some of the sport’s top institutions.

An adult coach sexually assaulted teenage boys at Premier Athletics, according to allegations in a federal lawsuit filed in Memphis that is similar to a previous complaint against Rockstar Cheer in South Carolina.

In both cases, attorneys said leaders at Varsity Spirit, which runs competitions, and the U.S. All Star Federation, the country’s cheerleading governing body, failed to provide a safe environment for athletes.

The lawsuit, brought anonymously by two teenage boys and one boy’s mother, alleges that a Premier Athletics coach sent nude pictures and masturbation videos and instigated nonconsensual sexual acts.

The coach has not been charged, and The Associated Press is not naming him. Varsity and USASF did not immediately respond to email requests seeking comment.

In a statement to the AP, Premier Athletics Knoxville West said it was “inaccurately implicated” in the lawsuit, in which the majority of the allegations are said to have occurred before current ownership purchased any gyms.

In the statement, Premier Athletics said it heard June 26 from an athlete who reported receiving inappropriate photos from the coach. According to the statement, Premier suspended the coach and immediately made a report to local law enforcement and USASF, neither of whom substantiated the complaint. Premier fired the coach, according to the statement.

Premier said it heard Sept. 18 from one athlete that another athlete had a “physical relationship” with the coach. After reporting that allegation to local law enforcement and USASF, Premier said, it did not contact the alleged victim’s family to avoid any accusations of interfering with an investigation.

Premier Athletics received reports in late May or June, but the coach continued to access the gym as recently as this month, according to the boys in the lawsuit.

Even after USASF added the coach to its ineligible list, the boys allege, he continued to participate in private lessons with minors on the gym’s premises. In a July message, the coach told one of the plaintiffs that the gym manager told him he would not be fired, according to the boys in the lawsuit.

Also in July, USASF sent the coach a report notifying him of the allegations. That same week, the boys allege in the lawsuit, the coach worked at camps run by the Universal Cheerleaders Association, which was established by Varsity founder Jeff Webb, and remained a Varsity representative.

The boys stated in their lawsuit that USASF and Varsity endangered athletes by failing to report the misconduct to local law enforcement.

At a news conference Tuesday, the plaintiffs’ lawyers said that “insular” systems within the cheer industry make it difficult for athletes to report misconduct. These institutions, the lawyers said, have set up an intentionally convoluted process. Lawyers noted that local gyms must become USASF members to participate in Varsity competitions.

“Varsity and the companies that it empowers have an endowment that is funded on the backs of these athletes,” attorney Jessica Fickling said. “The athletes and their families pay copious amounts of money to ensure that this sport continues. And for that money they are given a promise that they are going to be safe, that the environments that they cheer in, the gyms and competitions, will be safe. And yet, those environments are ill-equipped to handle these kinds of allegations.”

Lawyers with the Strom Law Firm said Tuesday they are aware of other potential victims and seek to expedite this case. Attorney Alexandra Benevento said the allegations are part of a greater “culture of oversexualization in cheer.”

Attorney Bakari Sellers also said he prepared documents this weekend for an unnamed federal agency. The lawsuit comes toward the end of a month that has disturbed families within the cheer industry after similar accusations from plaintiffs represented by Strom Law Firm against well-known coaches in South Carolina.

“This is not just something that happens in Greenville,” Sellers said. “This is not just something that happens in Knox County. This is something that’s happening all around the country.”

Adrian Sainz in Memphis contributed to this report.