The Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, has condemned an Alabama Supreme Court ruling ordering probate judges to stop issuing marriage licenses to gay and lesbian couples.

Two conservative groups, the Alabama Policy Institute and the Alabama Citizens Action Program, turned to the state's highest court after a federal judge struck down the state's ban on gay marriage last month.

In its 148-page ruling, the court concluded that “probate judges have a ministerial duty not to issue any marriage license contrary to” state law.

(Related: Alabama Supreme Court orders judges to stop issuing marriage licenses to gay couples.)

“The Alabama state Supreme Court does not have the authority to interfere with a federal court order,” said Sarah Warbelow, legal director at HRC. “This order is outrageous and baffling, and no amount of legalese can hide the bare animus that forms the foundation of this extralegal ruling.”