Guided missile destroyer USS Ross (DDG 71) pulls into Naval Station Norfolk, Virginia, the largest naval base in the world, July 7, 2011.  in this July 7, 2011 U.S. Navy handout photo obtained by Reuters March 1, 2013. The Department of Defense annou
Guided missile destroyer USS Ross (DDG 71) pulls into Naval Station Norfolk, Virginia, the largest naval base in the world, July 7, 2011. in this July 7, 2011 U.S. Navy handout photo obtained by Reuters March 1, 2013. The Department of Defense annou

Two former executives of a Singapore-based defense contractor have been charged with conspiracy to defraud the U.S. Navy and other offenses.

The U.S. Department of Justice said former Glenn Defense Marine Asia executives Neil Peterson and Linda Raja are accused of submitting false claims totaling more than $5 million to the Navy.

The company's CEO, Leonard "Fat Leonard'' Francis, is awaiting sentencing after pleading guilty to bribing Navy officials with more than $500,000 in cash, prostitutes, luxury hotel stays and other gifts in exchange for classified information.

Peterson and Raja were taken into custody by authorities in Singapore at the request of the U.S. government.

In June, U.S. Navy Rear Admiral Robert Gilbeau pleaded guilty to a charge of lying to federal investigators, making him the highest-ranking officer to be convicted in the case. Gilbeau is awaiting sentencing.

Sixteen people, including 11 current or former U.S. Navy officials, have been charged in the investigation, prosecutors said.