NEW YORK: MICHAEL JACKSON'S private doctor waited over an hour to call emergency services when he realised the singer was not breathing, according to newly-released documents.

Police filed the documents to support their request to search a Las Vegas pharmacy in August.

They provide new insight into what happened on June 25, when the 50-year-old "King of Pop" went into cardiac arrest and died, Sky News reported on its website.

They say his physician Conrad Murray told authorities he administered the anaesthetic propofol after trying other medications to help Jackson sleep, and after his "repeated demands" for it.

Jackson went into cardiac arrest within 20 minutes of that injection, while Murray had stepped out to use the bathroom, the doctor told authorities a few days after the death.

By Murray's account to police, he did not call for help until 12.22pm, more than an hour after he realised Jackson was not breathing.

Telephone records show that Murray used his mobile phone for 47 minutes, with three callers, from 11.18am to 12.05pm during which he said he was conducting CPR. "Murray did not mention this to the interviewing detectives," the documents say.

Police have not disclosed to whom they believe Murray spoke in those calls.

They found medication bottles for at least eight sedatives by Jackson's bed and around his home.

Dr Murray, 56, has not been charged with a crime, but the details in these documents show authorities were suspicious of his behaviour, even as they took Jackson to UCLA Medical Centre to try to revive him.

Murray was asked to sign the death certificate but vanished from the hospital premises.

"Upon arrival at the centre, neither the coroner's investigators nor detectives could locate Murray to re-interview him," according to the documents.

Repeated attempts to contact him were unsuccessful.

Propofol is usually used in medical settings by anaesthesia professionals to render patients unconscious for surgery. The milky drug is not meant for use as a sleep agent and is not regulated as a controlled substance.

Meanwhile, a collection of Jackson memorabilia, including the now iconic rhinestone-studded glove he wore when he performed his first moonwalk dance in 1983, is being auctioned.

The glove and other items are part of a music memorabilia sale organised by Julien's Auctions at the Hard Rock Cafe in New York's Times Square.

Jackson wore the left-handed glove when he unveiled what was to become his trademark dance on Motown's 25th-anniversary TV special. It's a modified, store-bought glove covered with rhinestones.

Its pre-auction estimate is between $40,000 (BD15,142) and $60,000 (BD22,714).

The pop icon gave the glove to Walter 'Clyde' Orange, of the singing group the Commodores, after the 1983 performance.