An Austrian beauty influencer vanished while heading home from a Christmas party — and her ex-boyfriend and two of his relatives have now been arrested.

Stefanie Pieper, 32, has not been seen or heard from since she got out of a taxi with her friend at her apartment in Graz, the second largest city in Austria, on Sunday morning.

She never made it to a photoshoot the following day, according to local police.

Local authorities found her dog alone in her apartment and confirmed that her phone had been turned off, according to Austrian news outlet Kurier.

Her former boyfriend was arrested after he allegedly torched his car in a casino parking lot in Slovenia on Monday, local police said .

“He was found in the immediate vicinity of the burning vehicle and arrested by the Slovenian polic

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