(CNN) Former NFL stars Clinton Portis and Joe Horn are among 12 retired players accused of defrauding the league's retiree health care benefits plan for more than $3 million, according to federal prosecutors.

Ten retired NFL players were charged in two indictments for allegedly submitting phony health care claims seeking to be reimbursed for expensive medical equipment that was never purchased, prosecutors said in a press release . The Department of Justice said it also plans to file charges against two other retired players.

The scheme, which lasted from June 2017 to December 2018, led to over $3.9 million in false and fraudulent claims, of which the plan paid out more than $3.4 million, prosecutors said in a news release.

"Ten former NFL players allegedly committed a brazen, multi-million dollar fraud on a health care plan meant to help their former teammates and other retired players pay legitimate, out-of-pocket medical expenses," Assistant Attorney General Brian Benczkowski said in a statement.

Four former players were arrested and six agreed to turn themselves in, Benczkowski said.

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