(CNN) Internal investigators for US Customs and Border Protection have identified 70 individuals, 62 of which are current employees, who are connected with inappropriate or derogatory posts or the Facebook groups that had such posts, they announced Monday.

Earlier this month, media reports revealed the existence of secret Facebook groups with an apparent nexus to CBP that were discovered to contain vulgar and sexually explicit posts. One Facebook group, dubbed "I'm 10-15," was exposed by the investigative reporting group ProPublica and reportedly included current and former Border Patrol agents.

Assistant Commissioner for CBP's Office of Professional Responsibility Matt Klein told reporters in a call Monday that the majority of the individuals identified so far are from the "I'm 10-15" group, while some were part of other Facebook groups, including "The Real CBP Nation," which CNN reported on earlier this month

"Obviously the number of cases, we anticipate will continue to grow as we receive additional information and perform further research and conduct interviews," Klein said.

CBP officials said at the time that they were investigating "disturbing social media activity."

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