Catherine Herridge reported on "Happening Now" about the role social media played in the violence and looting that erupted in Baltimore and possible links to the violent protests in Ferguson, Missouri.

Herridge said that a review of the social media traffic in downtown Baltimore Monday night found striking connections to the protests in Ferguson, according to a leading data mining firm.

The firm, which asked to remain anonymous because of its government work, found that 20-50 social media accounts in Baltimore were also tied to the peak violence in Ferguson, Herridge reported.

She added that the firm described the finding as "surprising," saying that the data suggests that "professional" protesters and anarchists are possibly fueling the violence in Baltimore.

"Some of these accounts don't call for outright violence, but at the very least, the tweets are menacing and ominous," Herridge said.

She also revealed that the data mining specialist has identified a recent social media spike in Washington, D.C., Philadelphia and New York City of protesters looking for rides to Baltimore, suggesting that the situation may not be over yet.

Watch Herridge's full report in the "Happening Now" clip above.

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