Mexico’s health care agency is suing Zimmer Biomet for a refund on purchases it made from the company during a long-running bribery scheme. The agency claims the bribery, which was admitted in a 2017 settlement with the US government, nullified its contracts with the device maker.

The company came under a Department of Justice inquiry for overseas bribery in 2012, and new allegations in 2014 have delayed a final close-out of the case. The formal agreements expired on March 26, but Biomet says it expects the investigation to continue.

Zimmer Biomet is now the second-largest orthopedic device maker behind Johnson & Johnson now that the merger between the two firms is complete. The companies divested some U.S. knee, elbow and bone cement assets in conjunction with finalized the deal after having sold of some European assets earlier in the year.