Inc’s  Questioning CEO Musk Financing Plan because they have not yet received any detailed this famous financing plan, indeed is seeking more information understand how CEO Musk will proceed take U.S. electric car maker private in a proposed deal worth $72 billion.

’s raised various questions from multiple discussions Musk’s proposal since the information became public on Tuesday, under a financial pressure from investors the publicly declared it has not yet received information on who will provide the funding, one the sources said.

However Musk, a 47-year-old entrepreneur, an engineer, stunned financial markets on Tuesday, when he revealed on Twitter he was considering a take-private deal for , an auto manufacturing pioneer that developed the world’s first ever premium all-electric sedan car.

This bold -over came because the Tesla funder CEO Elon Musk has launched for months a drastic battling with the investors. At a moment when public , journalists, analysts asked whether Tesla a profit produce the mass market sedan model electric car meet demand.

Musk said in a tweet on Tuesday that he had secured financing for the deal, but he did not publicly provide further details.

Speculation has swirled among shareholders and investment bankers who fund a deal of that size, especially given that the ’s bonds already rated junk by rating agencies.

The U.S. Securities and Exchange Commission has contacted Tesla ask about CEO Elon Musk assertion on Twitter that funding for his proposed deal was “secured”, the Journal reported on Wednesday.

The revelation that the board is seeking more details from Musk raise new questions about how he plans to finance the deal at his proposed price of $4 per share.

After jumping to close at $379.57 on Tuesday, Tesla shares have since fallen about 7 percent to end trading at $352.45 on Thursday, amid skepticism over the deal’s prospects.

In a statement on Wednesday, Tesla’s board said its discussion with Musk “addressed the funding” for the deal, without offering more details.

The board expects to make a decision on whether to launch a formal review of Musk’s proposal in the coming days and is speaking to investment bankers about hiring financial advisers to assist it in its review in scenario, the sources said.

If the board launches a formal review of CEO Elon Musk bid, he would have to recuse himself, or a special board committee would have to be formed, according to the sources, who requested anonymity because the deliberations .

The exact information that Musk communicated to the board about his plan could not be learned.

Taking Tesla private would remove the pressure from Musk coming from hedge funds betting that the ’s stock will drop given its production issues and negative flow, as well as the glare of that comes with reporting quarterly earnings publicly.

The company faces a make-or-break moment in its eight-year history as a public company as competition from European automakers is poised to intensify with new electric from Audi and Jaguar, with more rivals entering the market next year.

Tesla is still working its way out of what Musk called “production hell” at its home factory in Fremont, California, where a series of manufacturing challenges delayed the ramp-up of production of its new Model 3 sedan on which the company’s profitability rests.

Meanwhile, Tesla has announced plans to build a factory in Shanghai, China, and another in Europe, but details scarce and funding unknown.