The Federal Trade Commission reportedly launched a last-minute probe into whether Uber and Lyft illegally colluded to keep New York City driver pay lower — an inquiry launched on the same day that Lina Khan announced she was stepping down as chair of the agency.

New York City’s rideshare regulator said Uber Technologies Inc. and Lyft Inc. are “spreading disinformation” in emails sent to drivers and riders about proposed rules that would give drivers a roughly 6% pay hike.

The U.S. Federal Trade Commission is investigating Uber (NYSE:UBER) and Lyft (NASDAQ:LYFT) on how its drivers are compensated in New York City and whether the two made an illegal agreement on driver pay,