Oklahoma has executed a man for a 1997 killing despite a recommendation from the state’s Pardon and Parole Board that his life be spared.

Oklahoma Gov. Kevin Stitt has rejected clemency for a man facing execution for the 1997 hammer killing of a man.

Oklahoma’s attorney general has asked the state’s highest appeals court to set execution dates for 25 death row inmates following a federal judge’s rejection of their challenge to the state’s lethal injection method.

Oklahoma has scheduled its first executions since it put lethal injections on hold six years ago following a series of mishaps.