Clashes continued between defiant crowds and Baltimore police after a 10 p.m. emergency curfew took effect Tuesday night. Police said they deployed pepper balls on crowds in violation of curfew after a fire was started outside the library at Pennsylvania and North avenues, according to a tweet. Just before 10 p.m., a group of protesters began attacking officers with rocks and bricks, injuring at least one officer, police tweeted. Earlier, three representatives from the U.S Justice Department's civil rights division met with community and religious leaders, offering federal help with law enforcement and vowing to launch a civil rights investigation into the death of Freddie Gray. The meeting was described as productive and explicit directives were communicated. The curfew remains in effect until 5 a.m. Wednesday.