WASHINGTON (AP) -- Two employees of the U.S. Army Corps of Engineers and two others have been arrested in a bribery and kickback scheme.
The top federal prosecutor for the District of Columbia, Ronald Machen, plans to announce the arrests at a news conference Tuesday afternoon.
The names of the defendants were not immediately released.
The other two under arrest are the director of contracts for a Virginia-based company and the son of one of the Army Corps employees.
A law enforcement official who spoke on the condition of anonymity says the scam involved more than $20 million in bribes and kickback payments, and promised payments.
The official was not authorized to discuss specifics about the case before the U.S. attorney's announcement.
(Copyright 2011 by The Associated Press. All Rights Reserved.)