TULSA, Okla. (AP) The U.S. Department of Labor has begun an investigation of the Tulsa branch of the state Medical Examiner's Office.

Elizabeth Todd, a spokeswoman for the agency's Wages and Hours Division, told the Tulsa World the Labor Department could not release additional details because the probe is pending.

Medical Examiner's office spokeswoman Cherokee Ballard said the office is aware of the investigation, but she could not discuss details.

The state Medical Examiner's Office has been at the center of controversy over the past year.

Dr. Jeffery Gofton, Oklahoma's former chief medical examiner, resigned in June after releasing a plan to end autopsies in Tulsa. A recent state audit also revealed poor handling of records and a lack of sufficient background checks on employees hired to handle money.

In March, a key employee resigned amid claims of sexual harassment and pressure from lawmakers wanting to reform the agency's functions and accountability.

Chief investigator Kevin Rowland cited job stress in his letter of resignation, but his qualifications as a supervisor were questioned by lawmakers.