DETROIT — Ford Motor remains under federal investigation as part of a multi-year corruption probe into the United Auto Workers union, according to the lead prosecutor on the investigation.

U.S. Attorney Matthew Schneider told CNBC that the automaker and the UAW’s Ford unit remain targets in the probe, which initially started with Fiat Chrysler and its union counterpart.

“Ford and Fiat Chrysler, those investigations are still continuing,” he said Thursday during a phone interview. “You have to look at everything.” When asked whether the companies or their union departments remained under investigation, he said his team was “certainly not going to limit it to one or the other.”