The Senate Armed Services Committee plans to have an open hearing next week on the nude-photo-sharing scandal rocking the Marine Corps with testimony from the commandant of the service.

The committee will hear from Gen. Robert Neller at 10 a.m. Tuesday followed by a closed-door briefing, the committee announced Thursday.

The War Horse, a nonprofit military news organization, reported over the weekend that the Naval Criminal Investigative Service is investigating hundreds of Marines accused of sharing photos of nude female Marines and veterans, as well as their personal information, in a private Facebook group. The Facebook group, called "Marines United," had nearly 30,000 followers.

Some photos were allegedly taken and posted without the women’s knowledge or were meant to remain private. Comments on the page reportedly included rape threats.

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In addition to outrage over the photo sharing, some lawmakers have criticized the Marines for not responding to the scandal forcefully enough.

Rep. Jackie Speier (D-Calif.) said Wednesday that “heads should roll” over the scandal.

Late Wednesday, Senate Armed Services Committee member Kirsten Gillibrand Kirsten GillibrandSuburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits The Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida MORE (D-N.Y.) sent a letter to the leaders of the committee asking for a hearing on the issue.

“This unacceptable behavior spotlights a culture of disrespect for female service members that undermines good order and discipline in the military and weakens military readiness,” she wrote in the letter to Sens. John McCain John Sidney McCainKelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks Trump pulls into must-win Arizona trailing in polls MORE (R-Ariz.) and Jack Reed John (Jack) Francis ReedWhen 'Buy American' and common sense collide Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE (D-R.I.).

The sergeant major of the Marines said Wednesday the service has been careful about how it responds publicly to avoid the appearance of unlawful command influence, citing a judge’s rebuke of a former commandant on the issue.

Neller’s appearance in the Senate is set to come before a previously announced closed briefing to the House Armed Services Committee later next week.