Ferguson was a community on edge again Monday, a day after a protest marking the anniversary of Michael Brown's death was punctuated with gunshots and police critically wounded a black 18-year-old accused of opening fire on officers.

St. Louis County Executive Steve Stenger issued a statement on Monday declaring a state of emergency in Ferguson, following a shooting involving police on Sunday night.

Police have converged on a home in Ferguson, Missouri, and taken people in for questioning following the shootings of two police officers. The two officers were shot during a protest outside Ferguson police headquarters early Thursday morning.

A mayor is pressing for calm in his St. Louis suburb after a white police officer fatally shot a black 18-year-old police say pointed a handgun at the officer.

Violent protests broke out again in suburban St. Louis after another fatal shooting of a black 18-year-old by a white police officer.