Australian police say they have freed a teenager trapped inside an upscale Sydney home for nearly 10 hours with an apparent bomb strapped to her body.

A police spokesman, commenting immediately after the young woman was rescued by a bomb squad, said authorities did not yet know whether the device was explosive.

Sydney Police Free Teenager Trapped with Suspected Bomb

The victim was reported safe and reunited with her parents.

Sydney Police Free Teenager Trapped with Suspected Bomb

The spokesman also told reporters a probe was launched immediately after the rescue, and said police believe the investigation will "take a number of hours."

Sydney Police Free Teenager Trapped with Suspected Bomb

Earlier, as the ordeal unfolded, police declined to confirm local reports that an intruder had strapped a so-called "collar bomb" to the young woman, who called police from her home Wednesday afternoon.

Australian television, quoting local media, said a note was also attached to the woman's neck as part of a suspected extortion attempt. The report said the unidentified woman belongs to one of Sydney's wealthiest families.