Paddock, who officials believe had an escape planned, fatally shot himself as a SWAT team descended on his hotel room.
The hotel is located directly across the street from the music festival's venue. We are cooperating with the authorities on this matter.
Paddock, a reclusive 64-year-old high-stakes gambler, rained bullets on the crowd at a country music festival from his 32nd-floor hotel suite, killing 58 and wounding hundreds before taking his own life.
The Chicago Police Department said in a statement that it was aware of the TMZ report about the Blackstone booking. It quoted no sources by name.
Clark County Sheriff Joe Lombardo gave the first detailed timeline of the massacre on Wednesday evening, saying the shooter fired hundreds of rounds for a full 10 minutes from his Las Vegas hotel room as music fans ran for their lives outside.
Staff at The Ogden have not been able to confirm that Paddock stayed at the hotel. Lombardo said some victims were counted twice in the confusion following the shooting.
Meanwhile, the number of wounded in the Sunday night massacre has been lowered from more than 500 to 489.
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Paddock reportedly requested a room with a view, but never showed up for his reservation, according to TMZ sources.
"You've got to make the assumption he had to have some help at some point". The sold out festival draws 100,000 attendees each day and is considered the hot ticket in town attracting known dignitary kids such as Malia Obama and others.
Colvin says the Australian authorities are "working very closely with our partners in the U.S".
The reservation was made in late July, which suggests the killer was planning his attacks for months. The official wasn't authorized to discuss the investigation and spoke only on condition of anonymity after being briefed on the investigation.
Because so few people knew Paddock well, investigators will have a harder time probing his background for clues or hints he may have dropped about his plans, Southers said.