Nearly two dozen corporate executives and employees were arrested Monday in Las Vegas and in Miami in the first large-scale foreign bribery investigation using undercover federal agents, the Justice Department announced Tuesday.

Sixteen indictments were unsealed Tuesday in the U.S. District Court for the District of Columbia charging executives and employees in the military and law enforcement equipment industry with violations of the Foreign Corrupt Practices Act. Twenty-one people were arrested Monday at a convention in Las Vegas. The indictments were returned in federal court in Washington in December.