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At least four other people have been arrested in the alleged eight-billion-dollar scam masterminded by Texan billionaire financier Allen Stanford, CNBC reported.
Among those arrested were two Stanford group accountants expected to appear in a Texas courtroom and others could be held in other jurisdictions, the business network said.
Stanford's chief investment officer Laura Pendergest-Holt is also expected to face fresh fraud charges under the criminal indictment.
Justice department officials declined to comment on the report, telling AFP that they would provide more information at a press conference later Friday.
An indictment against Stanford was expected to be unsealed during his arraignment at a federal court in Richmond, Virginia.
The hearing, federal prosecutors said, was set for 1:30 pm (1730 GMT) before Judge M. Hannah Lauck.
