UPDATE: The Nevada Supreme Court is scheduling fast-track oral arguments about the stalled execution of a death-row inmate whose lethal injection is being challenged by pharmaceutical companies that don't want their drugs used.          

Three justices on Thursday also granted drug company Sandoz Inc. entry to the case as a "friend of the court" participant at the Sept. 12 hearing.          

The court panel lifted a temporary hold on legal proceedings in state court in Las Vegas about the twice-postponed execution of Scott Raymond Dozier.         

But it was not immediately clear if lower court hearings would be held before the Supreme Court hears from drug companies Alvogen, Hikma Pharmaceuticals and Sandoz.         

The makers of a sedative, the powerful opioid fentanyl (FEN'-tah-nil) and a muscle paralytic drug accuse the state of improperly obtaining their products.

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The State of Nevada has filed new documents in the Scott Dozier case, in the hope that the case against the drugs being used in the execution will be dropped.

The documents detail Tuesday's execution of convicted murderer Carey Dean Moore in Nebraska. The state used a similar drug cocktail as the one planned for Scott Dozier's execution here in Nevada and a drug company tried to stop the use of its drug in the execution too, but Nebraska's Eighth District Court denied that restraining order.

Nevada state officials say due to this case and a similar one in Arkansas as well, drug makers should not be able to stop Dozier's execution. 

The Nevada Supreme Court plans to hear the Dozier case soon.

The new documents can be found below:

The Nevada Supreme Court has stepped in to decide whether drug companies can try to stop the state from using their medications in a twice-postponed lethal injection of a condemned inmate who wants to die.

A state court judge in Las Vegas canceled hearings Thursday following an order late Wednesday from six of the high court's seven justices.

Supreme Court intervention had been sought by the state attorney general's office regarding the execution of Scott Raymond Dozier.

The judge had planned to hear drugmaker Sandoz's request to join a bid by Alvogen and Hikma Pharmaceuticals to prevent Nevada from using their products in a three-drug combination never before tried in any state.

The third company, Sandoz Inc. is the manufacturer of the drug, cisatracurium. 

The two other companies, Hikma Pharmaceuticals previously won permission in court to intervene in Alvogen's lawsuit opposing the use of one of its drugs, the sedative midazolam.

Fifteen other states have sided with Nevada in a lawsuit against drug companies who sued to delay Scott Dozier's execution.

Republican attorneys general from 15 states filed documents with Nevada's Supreme Court on Monday. 

A judge blocked Dozier's execution hours before it was scheduled in July so she could hear Alvogen's claims that Nevada improperly obtained its sedative midazolam.

Last week the maker of the drug fentanyl joined the case.

The twice-convicted killer says he wants to die, but judges have for different reasons blocked the never-tried combination of drugs the state drew up after struggling to find lethal injection supplies.

(The Associated Press contributed to this report.)