BOSTON (AP) — Gov. Charlie Baker says his administration is investigating whether a staffer in the state's environmental agency endured retribution from superiors after her fiancé decided to run against a Republican state senator.

Baker, a Republican, told reporters on Thursday that he found the allegations "incredibly disturbing," although he noted they were still unproven at this point.

The Boston Herald reported ( ) that lawyers for Cynthia Lewis claimed in a letter that she was transferered and faced "harassment, threats, coercion and intimidation" from Baker appointees. The alleged retaliation came after her fiancee, Democrat J.D. Parker-O'Grady, launched a campaign to unseat incumbent state Sen. Donald Humason of Westfield.

Baker says he takes the accusations seriously, while adding that he maintains confidence in Energy and Environmental Affairs Secretary Matthew Beaton, a former Republican lawmaker.