AP

OKLAHOMA CITY (AP) — Oklahoma's attorney general has agreed to a six-month stay of execution for a death row inmate scheduled to die next week amid an investigation into last week's botched lethal injection.

Attorney General Scott Pruitt's office filed court documents Thursday saying it wouldn't object to a 180-day stay of execution being sought by attorneys for inmate Charles Warner while the investigation is underway.

Warner was scheduled for execution on the same night last week as Clayton Lockett in what would have been the state's first double execution since 1937. But Lockett's vein collapsed during his lethal injection, prompting prison officials to halt the execution. He later died of a heart attack.

Gov. Mary Fallin then issued a two-week stay of execution for Warner, whose attorneys asked for six months.