Seven police officers in Baltimore in the US, have been injured and one is unresponsive after protests there turned violent. A state of emergency has been declared amid violent protests over the death of a black man fatally injured in police custody. A week-long curfew has been announced and as many as 5,000 National Guard troops could be deployed. After dark, a community building that was under construction was engulfed in flames.
Earlier, dozens of people were seen confronting police, and 15 officers were injured. African American Freddie Gray, 25, died on 19 April after a week in a coma.