The largest casino resort in California was the scene of a fire this past Monday that resulted in three injuries and the venue’s hotel tower having to be completely evacuated. Now, local media outlets are reporting that the fire at the Pechanga Resort & Casino on the Pechanga Indian Reservation near Temecula may not have been an accident – it may have been intentionally set.

The fire broke out around noon on the first floor of the elevator shaft in the venue’s original hotel tower. All 517 rooms had to be evacuated and three guests were sent to the hospital. One had suffered burns as a result of the blaze and the other two suffered from smoke inhalation.

An arson specialist was called in to assist in the investigation and the local fire chief, Jason Keeling, told reporters that he had not been able to rule out the possibility that the fire was the work of an arsonist. However, he emphasized that there was no specific indication that pointed the investigation to arson.

In a statement from the casino, spokeswoman Ciara Green said, “At approximately 11:30 a.m., a fire broke out in a hotel elevator portal in the original tower of the Pechanga Resort Casino. The Pechanga Fire Department immediately responded and knocked the fire down.” She added that all guests and staff had been ordered to the venue’s ballroom “out of an abundance of caution” and were later allowed to return to their rooms around 5 in the afternoon.