Ferguson Police Department

US police departments used location data and other user information from Twitter, Facebook and Instagram to track protesters in Ferguson, Missouri, and Baltimore, according to a report from the American Civil Liberties Union on Tuesday.

The use of armored vehicles and dogs in efforts to restore order in Ferguson following the police shooting of a black teenager in the St. Louis suburb only fueled tensions, the US Justice Department said Thursday.

About 200 people attended a vigil in St. Louis on Thursday near where a black teenager was killed by police a day earlier, sparking angry clashes between residents and officers amid rumors the victim was only 13 years old, a city alderman said.

The government of St. Louis County extended for at least 24 hours a state of emergency in Ferguson, Missouri, which has been the scene of protests a year after an unarmed black teenager was killed by a white police officer.

The scene outside the Ferguson Police Department in Missouri on Friday night was familiar: A crowd of 300 protesters, angry over last year's fatal police shooting of an unarmed black teen, went toe-to-toe with a line of officers, screaming profanities.

Residents of Baltimore and activists across the United States waited today for official word on the cause of a black man's death in police custody earlier this month, as protests over the case spread to other cities.

Police fired smoke bombs and pepper pellets at protesters who defied a citywide curfew that went into effect late Tuesday across Baltimore, the latest US city roiled by unrest stoked by anger over police treatment of blacks.

Baltimore's mayor came under criticism on Tuesday for a slow police response to some of the worst urban violence in the United States in years in which shops were looted, buildings burned to the ground and 20 officers were injured.

The man accused of wounding two policemen during a protest rally outside the Ferguson, Missouri, police headquarters last week appeared in court on Monday briefly and did not enter a plea.

A 20-year-old man was charged on Sunday with first-degree assault in last week's shooting of two policemen during a protest rally in Ferguson, Missouri, a crime that shocked a city that has been devastated by months of racial strife.

As the hunt for suspects in the shooting of two police officers in Ferguson, Missouri, extended into a third day, activists took the first steps on Saturday to force the mayor out of office while residents awaited signs of progress in the investigation.

The shooting of two police officers at a protest in Ferguson, Missouri, triggered a sweeping manhunt for suspects on Thursday and ratcheted up tensions in a city at the center of a national debate over race and policing.

Two police officers were shot during a protest outside the Ferguson, Missouri police headquarters early on Thursday, police said, just hours after the city's police chief quit following a damning justice report into his department.

The embattled police chief in Ferguson, Missouri resigned Wednesday, a week after a scathing US Justice Department report into the fatal shooting of unarmed black teenager Michael Brown by one of his officers.

The city manager of Ferguson, Missouri, has resigned in the wake of a US Justice Department probe that found a range of systemic racially biased practices by the police and municipal court, the city said on Tuesday.

US police departments used location data and other user information from Twitter, Facebook and Instagram to track protesters in Ferguson, Missouri, and Baltimore, according to a report from the American Civil Liberties Union on Tuesday.

The use of armored vehicles and dogs in efforts to restore order in Ferguson following the police shooting of a black teenager in the St. Louis suburb only fueled tensions, the US Justice Department said Thursday.

About 200 people attended a vigil in St. Louis on Thursday near where a black teenager was killed by police a day earlier, sparking angry clashes between residents and officers amid rumors the victim was only 13 years old, a city alderman said.

The government of St. Louis County extended for at least 24 hours a state of emergency in Ferguson, Missouri, which has been the scene of protests a year after an unarmed black teenager was killed by a white police officer.

The scene outside the Ferguson Police Department in Missouri on Friday night was familiar: A crowd of 300 protesters, angry over last year's fatal police shooting of an unarmed black teen, went toe-to-toe with a line of officers, screaming profanities.

Residents of Baltimore and activists across the United States waited today for official word on the cause of a black man's death in police custody earlier this month, as protests over the case spread to other cities.

Police fired smoke bombs and pepper pellets at protesters who defied a citywide curfew that went into effect late Tuesday across Baltimore, the latest US city roiled by unrest stoked by anger over police treatment of blacks.

Baltimore's mayor came under criticism on Tuesday for a slow police response to some of the worst urban violence in the United States in years in which shops were looted, buildings burned to the ground and 20 officers were injured.

The man accused of wounding two policemen during a protest rally outside the Ferguson, Missouri, police headquarters last week appeared in court on Monday briefly and did not enter a plea.

A 20-year-old man was charged on Sunday with first-degree assault in last week's shooting of two policemen during a protest rally in Ferguson, Missouri, a crime that shocked a city that has been devastated by months of racial strife.

As the hunt for suspects in the shooting of two police officers in Ferguson, Missouri, extended into a third day, activists took the first steps on Saturday to force the mayor out of office while residents awaited signs of progress in the investigation.

The shooting of two police officers at a protest in Ferguson, Missouri, triggered a sweeping manhunt for suspects on Thursday and ratcheted up tensions in a city at the center of a national debate over race and policing.

Two police officers were shot during a protest outside the Ferguson, Missouri police headquarters early on Thursday, police said, just hours after the city's police chief quit following a damning justice report into his department.

The embattled police chief in Ferguson, Missouri resigned Wednesday, a week after a scathing US Justice Department report into the fatal shooting of unarmed black teenager Michael Brown by one of his officers.

The city manager of Ferguson, Missouri, has resigned in the wake of a US Justice Department probe that found a range of systemic racially biased practices by the police and municipal court, the city said on Tuesday.