Dozens of children were caught in choking clouds of tear gas before being forced to shelter on a pedestrian bridge over the main road to escape the noxious fumes.
Children screamed as police officers in riot gear and waving truncheons pushed them back, some panicking as they sought water to wash their burning eyes.
22:53 Little Rock police release name of officer in fatal shooting22
19:00 Police serving warrants shoot, kill 2 who raised guns at Maryland motel23
22:27 Jamar Clark: No Discipline for Officers in Fatal Shooting17
18:56 Milwaukee police officer who fatally shot Sylville Smith arrested, charged with sexual assault14