Convicted Hi Fi Shop killer William Andrews has asked for a stay of execution, state Supreme Court officials said Monday.

Andrews, convicted in 1974 in the murders of three people, is scheduled to be executed by lethal injection Sept. 14. His accomplice, Pierre Dale Selby, was executed last year.Court officials do not know when the motion will be heard.

Andrews' attorneys believe the stay will be granted because of a separate appeal pending before the Utah Supreme Court. The court is scheduled to hear that appeal Sept. 12. It contends Andrews' previous attorney was incompetent.

Meanwhile, Andrews petitioned Friday for a commutation hearing before the state Board of Pardons.

Andrews and Selby were convicted of torturing five people in Ogden's Hi Fi Shop. Three of the victims died after they were forced to drink liquid drain cleaner and shot.