WASHINGTON — Moving swiftly, the Secret Service forced out three agents Wednesday in a prostitution scandal that has embarrassed President Barack Obama. A senior congressman welcomed the move to hold people responsible for the tawdry episode but warned "it's not over."

The agency announced three agents are leaving the service even as separate U.S. government investigations were under way.

The Secret Service did not identify the agents being forced out of the government or eight more it said remain on administrative leave. In a statement, it said one supervisor was allowed to retire and another will be fired for cause. A third employee, who was not a supervisor, has resigned.

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