Apple Inc. Chief Executive Officer Tim Cook refused to take a meeting years ago to discuss acquiring Tesla Inc., Elon Musk said on Tuesday.

Tesla CEO Musk said in a tweet that he reached out to Apple during the “darkest days” of development of his company's Model 3 to talk about a possible deal. Musk said he planned to discuss the possibility of selling Tesla to Apple for one-tenth of its current value, indicating a valuation of about $60 billion.

In 2017, Tesla burned cash as it ramped up output of its mass-market Model 3 electric vehicle. Musk told employees then at the company's Fremont, California, plant that it faced a period of “production hell” for six months or longer. Weeks after making that statement, he tweeted about sleeping on the roof of a factory as he tried to resolve bottlenecks.

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