"She just said that they were off, and I was like, 'It doesn't matter if they're off! They shouldn't be there in the first place pointing at the bed,'" Aranda told the television station.
Since it was late, the couple waited until the next morning to confront the owner and call police, KABC reported.
Garden Grove police confirmed there was a hidden camera in the room but said it was not turned on and nothing had been recorded, the television station reported.
The Garden Grove listing is no longer on the Airbnb website, and the company reportedly gave the couple a refund, KNBC reported.
"The safety and privacy of our community -- both online and offline -- is our priority," Airbnb said in a statement. "Airbnb's policies prohibit hidden cameras in listings, and we take reports of any violations very seriously."