Tesla's shares rose after his tweet, but investors in the company's bonds and convertible debt were sceptical that the tens of billions of dollars needed for the buyout would materialize.
The Justice Department asked Tesla for documents about Musk's announcement, Tesla said, describing it as a "voluntary request".
On Tuesday, Bloomberg News reported that the U.S. Justice Department has started an investigation over public statements made by Musk and the company. "We respect the DOJ's desire to get information about this and believe that the matter should be quickly resolved as they review the information they have received".
A probe by the justice department could take months to complete, and could result in no charges being laid.
SEC enforcement attorneys in the San Francisco office were already investigating Tesla before Musk sent his tweet on taking the company private, Bloomberg reported August 9.
Tesla shares reversed gains and dropped as much as 4.4 percent to $282.
The company, whose stock has slumped 25 percent in the past six weeks amid a string of controversies, could raise $2.5 billion in equity in the fourth quarter from investors that have a strategic interest in its business model, Morgan Stanley analysts including Adam Jonas wrote in a note dated September 18 outlining various possibilities.
U.S. stock benchmarks close at record highs
The Nasdaq also closed higher on Thursday, rising just less than 1% to close above 8,000, but short of a record close. The S&P 500 posted 32 new 52-week highs and no new lows; the Nasdaq Composite recorded 53 new highs and 58 new lows.
NASA telescope discovers two new planets
TESS will study 13 sectors in the southern sky the first year, followed by 13 sectors in the northern sky the second year. NASA plans to have TESS monitor 85% of the sky over the next two years, focusing on a new sector every 27 days.
Captain Cook's ship may be found off Rhode Island
Kevin Sumption, its director, said that a "promising site" had been located and that 3D image of it would be released shortly. In 1775, His Majesty's Bark Endeavour was sold to a private owner and renamed the far less evocative " Lord Sandwich II".
Shares skidded as word spread of a criminal investigation triggered by Musk's Twitter comments.
On Aug. 7, Musk announced on Twitter that funding was "secured".
Musk has also been criticisee for other unorthodox behaviour, including appearing on a podcast smoking marijuana and giving a tell-all interview to The New York Times in which he admitted to feeling overwhelmed and unable to sleep over Tesla's ambitious electric auto production targets.
Musk has taken heat as of late for the take-private bid, after it became nearly immediately clear that he didn't have funding lined up for the deal.
"Service & parts supply in general will be the top Tesla priority after we get through the insane auto delivery logistics of the next few weeks", Musk tweeted.
Now that Musk's tweeting has attracted the Justice Department's attention, investigators there could extend their review to other public statements made by the CEO about the company's health, according to one of the people familiar with the matter.
A series of high-profile departures, including that of chief accounting officer Dave Morton after just a month in the job, and HR executive Gaby Toledano have also rocked the company in recent weeks.
Stephen Crimmins, who spent 14 years at the S.E.C., first as a trial attorney and then deputy chief litigation counsel, told The AP that Musk "speaks loosely" and that his behavior probably won't cross the line into a criminal realm.
LeBron didn't stop tweeting, he just kept the focus on his new school and made a decision to ignore the President. James, a frequent target of Trump's, said it "bothers" him that Trump "had the time to even do that".
In a landmark achievement in 2016, the company unveiled a launch system -Big Falcon Rocket (BFR)- which helps this lunar mission. Branson's Virgin Galactic has sold tickets for about $250,000, which is more than the median home price in the United States.
Daniels also wrote that Roethlisberger "stood outside, not leaving" while knocking for several minutes until he eventually left. He was chatting with Trump, and at the end of the night Trump asked Roethlisberger to walk her up to her hotel room.
Ramos issued a third violation, which included a game penalty, after Williams confronted him and called him a " thief ". Alize Cornet, a French tennis player, also received a code violation for briefly taking her shirt off to fix it.
Six years ago, 144 people died or disappeared when an overloaded ferry sank off the semi-autonomous Tanzanian island of Zanzibar. While it wasn't confirmed, it is believed more than 200 passengers were on board the vessel with a capactiy of about 100 people.
Their health was tracked for seven years from 2005, during which period 1.7% of the patients were diagnosed with dementia . He said there is sufficient information to suggest air pollution as a risk factor for dementia .
The Reuters poll also found O'Rourke with a strong advantage, by about a 2-to-1 margin, with Hispanic voters in Texas over Cruz. So, is one company more reliable than the other? "The disclosure on the poll shows it to be sound", said Henson.
No word yet on how West's comments have been received by the trio, as Drake Beckford and Cannon have yet to issue a response. So period, don't speak on nobody from my family, nothing that could even be mentioned with my wife, period.
There, he handed out packages of hot dogs and apple sauce and told the crowd, "Our hearts break for you". President Trump is now taking part in a briefing at Marine Corps Air Station in Cherry Point, N.C.
Even the 2018 Toyota Camry, a sedan that matched the Model 3's flawless scores in every test, had a 9.9% rollover resistance. That became crystal-clear in May, when the automaker promptly responded to tests conducted by Consumer Reports .
The meeting is unlikely to agree to an official rise in crude output, although pressure is mounting to prevent a spike in prices. Trump criticizing the Organization of the Petroleum Exporting Countries for not doing enough to keep prices lower.
China plans import tariff cuts as soon as October
The pair of powerhouse economies have already imposed tariffs on $50 billion worth of each other's imports. On Monday, the US and China are scheduled to impose a new round of tariffs on one another's imports.
Richard Jefferson's father killed in drive-by shooting
His mother and father split when he was very young and his mom took him to Phoenix, where she raised him with her new husband. He played for the Spurs from 2009 to 2012 and was traded by the team to Golden State in the middle of the 2012-13 season.