Protests spread in US following arrestee's death

Violent protests erupted in many other cities also and continued into the weekend.

In St. Louis, Missouri, one protester died after becoming caught between the two trailers of a truck as it drove away, the St. Louis Post-Dispatch reported.

In Oakland, California, an estimated 7,000 people gathered outside the city's police headquarters on Friday, and vandalism, looting and arson were reported across the city.

Also in Oakland, one federal security officer was fatally shot and another critically wounded a few blocks away from an anti-police protest on Friday night in what Department of Homeland Security officials described as an act of domestic terrorism, according to The Mercury News.

The officials said at a news conference on Saturday that the two federal protective officers were targeted by an "assassin" outside the Ronald V. Dellums Federal Building.