Violent Protesters Shut Down Interstate 94 Near St. Paul, Minnesota (VIDEO)

Here's the report, at CBS News 4 Minnesota, "102 Arrested, 21 Officers Hurt Following I-94 Protest."

More here, "Protesters Shut Down I-94; Multiple Officers Injured."

And at the Minneapolis Star-Tribune, "Police chief 'disgusted' by violence at I-94 protest; 21 officers hurt":

About 100 people protesting late Saturday and early Sunday in a sometimes violent response to the police killing in Falcon Heights of Philando Castile were arrested, either during an hourslong human blockade of Interstate 94 in St. Paul or during a follow-up gathering elsewhere in the city, authorities said.

The violence perpetrated by some of the protesters against the police prompted denouncement in the strongest terms by St. Paul Mayor Chris Coleman and Police Chief Todd Axtell, who called the pelting of officers with rocks, bottles and other items "a disgrace."

Axtell said 21 officers from all law enforcement agencies on the scene were injured in the mayhem. One of them suffered a broken vertebrae after a concrete block was dropped on his head, police said late Sunday afternoon. The State Patrol said six of the 21 were troopers who were slightly hurt by what the protesters were throwing.

President Obama weighed in Sunday on protesters directing violence against police, saying at a news conference during a one-day stop in Madrid that "any violence directed at police officers is a reprehensible crime."

The nation's first black president went on to say, "Whenever those of us who are concerned about failures of the criminal justice system attack police, you are doing a disservice to the cause."

More.

Chief Axtell says last night saw the worst anti-police violence in his 28 years on the job. He was "disgusted" by the criminality. There's a full video of the press conference here, "Saint Paul Police Headquarters July 10, 2016 8:00AM Central."