Musk, 47, also called the vehicle business "monumentally difficult" and repeated a point he's made in the past - that Tesla and Ford were the only US automakers to stay out of bankruptcy during the last recession.
The US Securities and Exchange Commission (SEC) is looking into claims that the electric carmarker has made over production of its Model 3 sedans a year ago.
"To our knowledge no government agency in any ongoing investigation has concluded that any wrongdoing occurred", Tesla wrote in its filing.
"The SEC has issued subpoenas to Tesla in connection with... certain projections that we made for Model 3 production rates during 2017 and other public statements relating to Model 3 production".
At least 7 Coptic Christians killed in bus attack in Egypt
Security officials said at least another 12 people were wounded in the attack, which bore the hallmarks of Islamic militants. As defense minister, el-Sissi led the military's 2013 ouster of an Islamist president, whose one-year rule proved divisive.
NASA’s Parker Solar Probe reaches closest to the sun
According to NASA, the plucky Parker Solar (spacecraft) is closer to the Sun than any other spacecraft has done before. The spacecraft has beaten the previous record set by the German-American Helios 2 that made its approach in April 1976.
Crude oil futures decline on overseas leads
Continuing trade tensions between the USA and China are raising concerns slower economic growth will slow the demand for oil. The price of crude oil fell yesterday after a new report from OPEC revealed that its members were increasing production.
The company has disclosed that it had received a subpoena from the Securities and Exchange Commission, and an informal request for information from the Department of Justice. The lawsuit cites repeated promises in 2017 that Tesla was "on track" to build 5,000 Model 3s per week by the end of that year at its factory in Fremont, California.
But the company also says if the government decides to take enforcement action "there exists the possibility of a material adverse impact on our business, results of operation, prospects, cash flows, and financial position".
Tesla has often struggled to hit its chief executive's ambitious production forecasts.
Tesla shares finished the day Friday up 0.6 percent, at $346.41.