Authoritied have opened a criminal investigation over holiday bread that sickened at least 40 people in California. The bread sold under the name Three Kings Day was found to contain a synthetic drug.

The bread was sold by Cholula’s Bakery in Santa Ana, Ca. People who consumed the bread experienced dizziness, palpitations, numbness and hallucinations.

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Three Kings Day SYNTHETIC DRUG 2

The synthetic drug was found in a preliminary investigation of Cholula’s Bakery, which was shut down on Tuesday. Confirmed laboratory results are expected in one to two weeks. Forty people fell ill eating the bakery’s Rosca de Reyes bread, a fruit cake eaten during Three Kings Day or Epiphany. The bakery distributed the bread to nearly a dozen different locations. h/t abc7

The bakery is expected to remain closed pending cleaning and investigation.