Facebook's $1bn acquisition of photo-sharing service Instagram is reportedly facing delays of several months, as US regulators probe the deal.
According to the Financial Times, two people familiar with the matter have confirmed that the Federal Trade Commission has launched an investigation into the purchase, because of the eye-popping price paid by the social networking maven.
That investigation could last up to 12 months, meaning Facebook cannot close the deal in the timeframe outlined in its initial public offering (IPO) prospectus.
Facebook originally announced its intention to buy Instagram in early April, with many market watchers expressing surprise at the price. It subsequently emerged that the deal had been largely brokered by Facebook founder and chief executive Mark Zuckerberg, without input from the company's management board.
But according to the FT, the major threat facing Facebook is not that the deal will be blocked by US competition regulators, which is seen as unlikely, but that it will disrupt Facebook's mobile strategy.
Instagram has proved to be a massive hit with smartphone users, a market where Facebook is desperate to expand.
The news could not come at a more delicate time for Facebook, which is due to launch its IPO in the coming weeks.
Facebook had not responded to a request for comment at the time of publication.
Finger pointed at "advanced" nation state attacker in Norwegian health records cyber attack
Kaspersky claims the ban is based on subjective, non-technical public sources - and unconstitutional
Google unleashes Cloud AutoML tool to enable ordinary Joes to train AI systems without having to write code
Next step: machine learning systems that can generate their own machine learning software
Pixel devices could be hijacked by confusing the engine and escaping the Chrome sandbox