The two prosecutors leading the Manhattan district attorney’s criminal case against former U.S. President Donald Trump’s real-estate company and its longtime chief financial officer resigned unexpectedly, according to a person familiar with the matter.

Carey Dunne and Mark Pomerantz, who have been at the helm of the probe, quit on Wednesday, the person said, less than two months after Manhattan District Attorney Alvin Bragg took office. Bragg inherited the investigation from his predecessor, Cyrus Vance, who brought the politically charged case just before he left office after 10 years on the job.

The resignations are a major twist in the probe, which last year led to criminal tax charges being filed against the Trump Organization and chief financial officer Allen Weisselberg. The company and Weisselberg, who stepped down from his position after being charged, have both pleaded not guilty and moved to dismiss the case.