ANNAPOLIS, Md. (AP) — Gov. Larry Hogan is asking the state school board to investigate allegations of fraud in one of Maryland’s biggest school systems.

Hogan sent a letter Sunday to Maryland State Board of Education President Andrew Smarick requesting the board begin looking at possible wrongdoing at Prince George’s County schools.

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The governor said there have been specific allegations about students’ grades being altered in order to boost high school graduation rates. His letter comes after some county school board members and state lawmakers have also called for an investigation.

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County Schools Chief Executive Kevin Maxwell has said the allegations made against the school system are false.

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