Reuters 

Authorities on Sunday imposed a midnight curfew for the second night a row in the tense St. Louis suburb where an unarmed black teen was shot to death last week by police, seeking to secure an elusive peace as protesters continued to gather.

Police blocked off at least one street to vehicle traffic before the sun had even set. The move came as scores of protesters began gathering along West Florissant Avenue in Ferguson, the site of ongoing protests as well as violence and looting since 18-year-old Michael Brown was shot to death on Aug. 9.

"They want to take it night by night," said Highway Patrol spokesman Justin Wheetley said of the curfew, imposed Saturday night by Missouri Governor Jay Nixon in an effort to quell protests and looting.