WASHINGTON (AP) - The District of Columbia has agreed to pay about $20,000 to four people who challenged their drunken driving convictions based on flaws in the police department's alcohol breath-test equipment.

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The settlements were revealed in documents filed Monday in U.S. District Court in Washington.

The four were part of a group that said their convictions were based on unreliable and inaccurate breath testing equipment.

They alleged that the police department had failed to properly calibrate the devices, and that prosecutors continued to rely on the scores even after knowing that the machines were flawed.

A lawyer for the plaintiffs did not immediately return messages seeking comment, and a spokesman for the Office of the Attorney General had no immediate comment.