Acting Homeland Security Secretary Kevin McAleenan said Wednesday he has ordered an investigation into reports that Border Patrol agents posted vulgar and derogatory messages against migrants and lawmakers in a secret Facebook group.

“Reporting this week highlighted disturbing & inexcusable social media activity that allegedly includes active Border Patrol personnel,” McAleenan tweeted, calling the posts “completely unacceptable.”

“Any employee found to have compromised the public’s trust in our law enforcement mission will be held accountable,” he continued.

Reporting this week highlighted disturbing & inexcusable social media activity that allegedly includes active Border Patrol personnel. These statements are completely unacceptable, especially if made by those sworn to uphold the @DHSgov mission, our values & standards of conduct. — Acting Sec. Kevin McAleenan (@DHSMcAleenan) July 3, 2019

I have directed an immediate investigation, and as the @USBPChief has made clear, any employee found to have compromised the public’s trust in our law enforcement mission will be held accountable. They do not represent the men and women of the Border Patrol or @DHSgov. — Acting Sec. Kevin McAleenan (@DHSMcAleenan) July 3, 2019

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One post included a photo illustration of Ocasio-Cortez engaged in oral sex with a detained migrant, and another showed President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE forcing the lawmaker's face into his crotch, about which one agent commented, “That’s right bitches. The masses have spoken and today democracy won.”

In another post, group members questioned whether the widely shared photograph of a father and his young daughter lying face down in the Rio Grande River may have been doctored. The photo was taken by The Associated Press and there is no evidence it was staged.

The comments added to the furor on Capitol Hill over the Trump administration’s handling of the influx of Central American migrants at the southern border. Also this week, a new report from the Department of Homeland Security’s independent watchdog showed squalid conditions at detention centers near the border.

Members of the Congressional Hispanic Caucus visited one center near Clint, Texas, and described similar conditions. Ocasio-Cortez also accused immigration enforcement officials of making threatening comments toward her.

Updated at 9:52 a.m.