The US Federal Trade Commission (FTC) is going to start an anitrust cartel investigation into the internet concern Facebook.
Let the insiders know about the case.
Earlier, sources had reported that the US Department of Justice had started a competition investigation into Google.
The steps taken by the supervisors follow a deal that the judicial authorities and the FTC have concluded.
In addition, the judiciary will take a closer look at Google, while the FTC will take care of Facebook and Amazon.
The US authorities would examine whether the internet giants are guilty of distortion of competition due to their dominant market positions.
Investors on Wall Street were shocked by the news.
The share of Google parent company Alphabet lost 6.6 percent in intermediate trading, Facebook fell 8.8 percent and Amazon fell 4.6 percent.