Law officers stand on a street during protests in Baton Rouge, Louisiana, US, July 10, 2016. [Photo/Agencies]

Protesters from Louisiana or out of state will not be allowed "to incite hate and violence, to engage in unlawful activities," Edwards told a news conference. "Now I want to be very clear. That will not be tolerated."

Edwards also said that blocking traffic was cause for arrest.

In Minnesota, state police said more than 200 protesters shut down Interstate 94 in St. Paul for hours on Saturday night to protest against Castile's killing. Officers were hit with rocks, bottles, concrete, construction materials and fireworks, police said.

The city's mayor and a protest leader both decried the violence, which injured 21 officers and led to 102 arrests. St. Paul police said one officer suffered a broken vertebrae when a concrete block was dropped on his head during the protest on the interstate.

"We will not tolerate the kind of shameless violence we saw throughout the course of the night," St. Paul Mayor Chris Coleman told a news conference. "This doesn't honor anyone's memory."