Two former executives of Air France were indicted in Chicago for fixing the prices of air cargo, the U.S. Justice Department said.

The indictments were the latest in a long-running price-fixing probe that has ensnared 21 airlines and 21 executives.

Marc Boudier, former executive vice president of the cargo division of Air France, and Jean Charles Foucault, former vice president of the cargo division of sales and marketing of Air France, face charges of conspiring with other air cargo carriers and their executives to push up prices, the department said.

The two men participated in the conspiracy from at least August 2004 to February 2006, the department said, citing the indictment.

Efforts to reach lawyers for Boudier and Foucault were not immediately successful.

The European Commission in Brussels has a related air cargo investigation.

Airlines caught up in the probe include British Airways , Korean Air Lines , Qantas Airways , Cathay Pacific Airways , El Al Israel Airlines Ltd and Singapore Airlines Ltd .

Four executives have been sentenced to prison, and more than $1.8 billion in criminal fines have been imposed, the department said. (Reuters)