He made the corresponding statement during his communication with residents of the American city of Kenoshi.
"Protests are protests, but nothing can justify looting, arson, and so on," RIA Novosti quoted him as saying.
According to him, those involved in robbery and arson should "be held accountable - period."
Earlier in the American Portland, protesters set fire to a building.
On September 1, US President Donald Trump announced that a riot investigation center would be created in the country.