Gov. Greg Abbott has requested that the Texas Rangers launch an investigation into allegations of sexual assault at Karolyi Ranch, the famed U.S. Olympic training facility where some gymnasts have said former team doctor Larry Nassar sexually abused them.

In a letter Tuesday to Texas Department of Public Safety Director Steve McCraw, Abbott called the allegations at the ranch "deeply disturbing" and the statements made by athletes as "gut-wrenching."

"Those athletes, as well as all Texans, deserve to know that no stone is left unturned to ensure that the allegations are thoroughly vetted and the perpetrators and enablers of any such misconduct are brought to justice," Abbott said. "The people of Texas demand, and the victims deserve, nothing less."

The Texas Rangers will be working with the Walker County sheriff's office to "comprehensively investigate all potential criminal conduct" at the ranch, which served as the national team training center for USA Gymnastics, the governor's office said in a written statement.

Abbott commended the sheriff's office for its diligence in the investigation. The sheriff's office confirmed last week that it has an open investigation into the ranch outside Huntsville, but did not give any details about the nature of the investigation or when it began.

The state's medical board has confirmed that Nassar treated athletes at the ranch without a Texas medical license.

Michigan Judge Rosemarie Aquilina sentenced Nassar last Wednesday to 40 to 175 years in prison after he pleaded guilty to multiple counts of sexual assault. Nassar, 54, had already been sentenced to 60 years in federal prison for child pornography crimes.

More than 150 women and girls have come forward to say Nassar molested them under the guise of medical treatment. Many of the accusers have blamed Michigan State, USA Gymnastics and the U.S. Olympic Committee for not doing more earlier to stop Nassar.

The allegations and Nassar's sentencing, which set off a firestorm throughout the gymnastics community, have led to fallout for the university and the organizations that govern the sport.

Days before the sentencing, three members of the USA Gymnastics board resigned. Within hours of the decision, the U.S. Olympic Committee called on all remaining members to step down.

The committee said it would pursue decertification if the organization did not "fully embrace the necessary changes in their governance structure along with other mandated changes under review right now."

At Michigan State, where Nassar was a team physician and associate professor, president Lou Anna Simon and athletic director Mark Hollis resigned after the sentencing.

A number of companies have also severed ties with USA Gymnastics, including Dallas-based AT&T, which announced Jan. 23 that it was suspending its sponsorship of the organization "until it is re-built and we know that the athletes are in a safe environment."

Under Armour also terminated its sponsorship and Hershey, Kellogg and Procter & Gamble have declined to renew existing sponsorship, ESPN reported.

As for Karolyi Ranch, the facility will no longer serve as the National Training Center for the team. USA Gymnastics has decided to end its relationship with the ranch. Women's National Team head coach Valeri Liukin has offered up one of his two gyms in Plano and Frisco as a temporary home.

The Associated Press contributed to this report.