Paris Hilton told cops she thought the cocaine allegedly found in her handbag during a search at the weekend was gum, according to a newly-released police report.

"The Simple Life" star was taken into custody in Las Vegas on Friday after a car she was traveling in was pulled over by cops and searched. The officers found a suspicious-looking white powder in her purse.

Hilton was briefly jailed and then released and now faces a hefty fine and four years behind bars.

A police report filed late on Friday suggests the socialite told cops the purse, in which the drug was found, was not one she owned - and that she thought the powder was actually gum.

In the official document, obtained by the Associated Press, Las Vegas police Lieutenant Dennis Flynn writes, "She told me the purse was not hers, that she had borrowed it from a friend.

"Hilton admitted the (asthma medication) Albuterol (also in the purse)... was hers and is prescribed to her, but the suspected cocaine was not. I asked Hilton whose cocaine it was, and she said she had not seen it but now thought it was gum."

Hilton's lawyer, David Chesnoff, has refused to comment on the police document.

The heiress will reportedly be officially charged by the Los Angeles District Attorney's Office on Monday.

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