A French prosecutor has opened an investigation into Fiat Chrysler Automobiles over allegations that the automaker may have cheated in diesel emissions tests, a judicial source told Reuters on March 21, 2017.

The source said the Paris prosecutor had opened the investigation on March 15, after the French finance ministry's consumer affairs and anti-fraud body had referred the case to the courts, according to Reuters.

The Reuters article stated that a Fiat spokesman reiterated that its diesel vehicles fully comply with emission regulations, as confirmed by the Italian Transport Ministry.

Following Volkswagen's admission in 2015 of cheating on U.S. diesel emission tests, Reuters reported that several European countries launched their own tests on vehicle emissions.