FREDERICK, Md. (AP) — Some postal workers in Frederick are challenging a U.S. Postal Service proposal to move local mail-processing operations to Baltimore.

Members of the American Postal Workers Union spoke at a public meeting that the postal service held Tuesday night in Frederick.

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The workers say the proposal doesn’t explain how moving about 185 jobs from Frederick to other locations would save the postal service a projected $4.2 million a year.

They say the study is flawed because it doesn’t account for the recent sharp increase in gasoline prices.

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The postal service says the proposal hasn’t been approved yet.

The agency is accepting public comments on the plan through May 25.

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