U.S. Marines in Helmand province in Afghanistan in 2012. Courtesy U.S. Marine Corps
U.S. Marines in Afghanistan in 2012. Courtesy U.S. Marine Corps

The Naval Criminal Investigative Service has begun an investigation into a closed Facebook group with about 30,000 followers that solicited nude photos of female Marines.

The Marine Corps Times, an independent newspaper focusing on issues involving the service, first revealed the existence of the photos when it published on Saturday an internal Marine Corps communications document that detailed how the service should respond.

Members of the Facebook group Marines United solicited nude photos of female service members, some of whom had their name, rank and duty station listed, the newspaper reported.

A Marine Corps spokesman told the newspaper that military officials are uncertain how many military personnel could be involved.

The chairman of the House of Representatives Armed Services Committee, Republican Mac Thornberry of Texas, and the panel’s senior Democrat, Adam Smith of Washington state, separately called for a complete investigation.

“Degrading behavior of this kind is entirely unacceptable,” Thornberry said in a statement. “I expect the Marine Corps to investigate this matter fully with appropriate consequences for those who willingly participated.”

Smith also called for proper care to be provided to the victims, and said that, “This behavior by Marines and former Marines is degrading, dangerous, and completely unacceptable.”

The site talked of misogynist behavior, the Marine Corps document said, and the photos were on a secure drive in cloud storage, which has been removed.

The document advised a response along the lines of: “The Marine Corps is deeply concerned about allegations regarding the derogatory online comments and sharing of salacious photographs in a closed website. This behavior destroys morale, erodes trust, and degrades the individual.”

According to an annual report that the Pentagon released in May 2016, the U.S. military received about 6,000 reports of sexual assault in 2015, similar to the number in 2014, but such crimes are still underreported.

Reuters contributed to this article.

Chris Jennewein is founder and senior editor of Times of San Diego.