Story highlights Police "restoring order ... reducing deployments" early Sunday

Two officers stopped two people in a car, authorities say

One armed man was fatally shot, police say

(CNN) Angry crowds took to the streets in Milwaukee on Saturday night to protest the shooting death of an armed man by a police officer hours earlier.

Protesters burned several stores and threw rocks at police in the city's north side, leaving one officer injured. Smoke and orange flames filled the night sky.

The incident started Saturday afternoon when two officers stopped two people who were in a car in the north side, according to the Milwaukee Police Department.

Shortly after, both car occupants fled on foot as officers pursued them, police said.

During the chase, an officer shot one of the two -- a 23-year-old man who was armed with a handgun, according to authorities.

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