It's not a good day to be a big-tech company.

Shares of Apple (AAPL - Get Report)  followed Facebook (FB - Get Report) , Amazon (AMZN - Get Report) and Google (GOOG - Get Report) lower on Monday after a Reuters report saying the Justice Department is considering a probe of the computer and iPhone maker sent investors running from all thing big-tech.

Shares of Apple about 1.5% following the report, after trading higher earlier in the day, bringing down the broader tech-heavy Nasdaq Composite index, which dropped after similar regulatory news also hit Alphabet's Google, as well as both Amazon and Facebook.

With Apple, the Justice Department has been given jurisdiction to probe the company's practices as part of a broad review into potential anti-competitive behavior among big tech companies, Reuters reported, citing two sources.

Earlier Monday, the Wall Street Journal reported that the Federal Trade Commission will examine how Facebook's practices affect digital competition.

The Washington Post also reported over the weekend that Amazon has come under heightened scrutiny by U.S. regulators. And on Friday, the Journal reported that the Justice Department is preparing a probe of Google, sending shares of parent company Alphabet down more than 7% Monday.

The possible Apple probe is linked to the Google probe, Reuters reported, and stems from meetings between the DOJ and the FTC.

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