(CNN Business) California Gov. Gavin Newsom responded Thursday to Tesla CEO Elon Musk's claim that the company had delivered more than 1,000 ventilators to the state's hospitals treating a surge of coronavirus patients.

In a series of tweets early Thursday, Musk asked Newsom to "please fix this misunderstanding" after the governor's office told CNN the state's hospitals had not received ventilators promised last month by the Tesla CEO. Included in the tweets from Musk was a partial list of hospitals that he said had been sent ventilators. In another tweet, he said the donations were "based on direct requests from their ICU wards, with exact specifications of each unit provided before shipment."

"I was not personally aware of that list," Newsom said at a press conference. "I'm very encouraged that he put out that list and those specific hospitals that's where he had been sending those resources and I look forward to learning more about where they went and am grateful for his support."

Ventilators? Or something else?

CNN contacted 10 California hospitals identified by Musk in the partial list of recipients he posted on Thursday. Of the four hospitals that responded, all said they had received bilevel positive airway pressure (biPAP) or continuous positive airway pressure (CPAP) machines — devices that can aid breathing and be used for sleep apnea. None had received ventilators.

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