Race agitators turned St. Paul, Minnesota into a third world war zone as they hurled bricks, bottles, materials from a construction site, and even lit fireworks at police officers Saturday night.

Fox 9 posted this photo on Twitter:

Here’s video of the incident as agitators sought to provoke police in the middle of an interstate.

St. Paul Police say the assailants also threw rocks, bottles, bricks and even rebar. “At least five” officers were injured, according to the department.

The department also reported concrete was dropped on an officer, “possibly” from a bridge.

St. Paul police confirmed Sunday night the officer suffered broken vertebrae after a concrete block was “dropped on his head.”

Twitter user @UR_Ninja posted a photo of one “peaceful” protester throwing an orange construction barrel in the path of on-coming officers.