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SOUTH LAKE TAHOE, Calif. - The Douglas County Sheriff's Department is seeking the public's assistance in locating a 19-year-old Petaluma teen who went missing in South Lake Tahoe while attending the SnowGlobe music festival over the New Year's holiday.

According to the Lake Tahoe News, Alyssa Byrne has not been seen since the last night of the three-day festival.

Byrne's friends told South Lake Tahoe police they last saw her where the group was staying at the Horizon Hotel-Casino between 12:30 a.m. and 1 a.m. on New Year's Day. However, Byrne's family members said they believed it was before midnight on New Year's Eve when the missing teen's friends last saw or received a text from her.

Byrne's mother, Kim Miller-Byrne, told the Lake Tahoe News the last text her daughter made to a friend indicated she was catching the shuttle back to the hotel from the music festival.

Miller-Byrne said her daughter had been checking in daily via text, so when she failed to do so, the family became worried and notified South Lake Tahoe police on Jan. 1.Police did not notify the Douglas County Sheriff's Department, under whose jurisdiction theHorizon hotel falls, until 3 p.m. on Jan. 2.

Byrne's friends looked for her, but returned from Tahoe with her belongings when they could not find her, according to Miller-Byrne.

Authorities conducted a search of the surrounding area to look for anyone who had possibly fallen into a snowbank or had some kind of accident. They were also working with the Horizon to review security tapes in hopes of seeing Byrne, and determining whether she was accompanied by anyone, said sheriff's Sgt. Pat Brooks.

Byrne's father hasgone to Tahoe and has beenhanding out flyers in an attempt toobtain information on his daughter's whereabouts.

Byrne was listed as 5 feet 3 inches tall, about 125 pounds, with blue eyes, dyed black hair, and fiar-complected. When last seen, she was wearingall-black clothing.

Anyone who may have seen her or hasinformation on her whereabouts wasasked to contact the Douglas County Sheriff's Department at (775) 782.5126.

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