Tennessee Governor Bill Lee has ordered a temporary halt to all state executions and initiated an independent investigation following a failed attempt to execute Christa Pike on Wednesday night. Pike, who was convicted of murder, was scheduled to be the first woman executed in Tennessee in over two centuries.

Reports regarding the execution process vary in detail. The Washington Examiner states that the procedure was delayed by nine hours and that officials administered two doses of pentobarbital before the attempt was ultimately unsuccessful. The Guardian reports that witnesses observed Pike awake and snoring approximately 40 minutes after the drugs were administered. Following the failed attempt, Pike was transported to an off-site medical facility; her current condition remains officially unconfirmed.

This incident marks the second time this year that Tennessee has struggled to carry out a lethal injection. The Hill notes that in May, officials were forced to call off the execution of Tony Carruthers after they were unable to successfully place an intravenous line. The state’s recent history of execution difficulties has prompted the current suspension of the death penalty, which will remain in effect until at least the end of the year while the independent inquiry is conducted.