FERGUSON, Mo. — About 200 people are rallying outside of a suburban St. Louis police department to protest the death of a black teenager who was shot by police.

The crowd chanted "We want answers" and "no justice, no peace," on Sunday morning before a police news conference.

Eighteen-year-old Michael Brown was shot and killed Saturday afternoon near his grandmother's house by a Ferguson police officer.

St. Louis County police have not given a reason for the shooting, which happened in a predominantly black suburb a few miles north of downtown St. Louis.

A few police officers came out of the building to observe the crowd, which carried signs saying "stop police terrorism" and "disarm the police."