A demonstrator hurls a tear gas canister back towards police lines in Fergusson, Missouri, after an apparent peaceful demonstration was broken up by heavily armed police officers overnight.
Police chief Thomas Jackson, who has been the public face of the city torn by the death on Saturday of Michael Brown, 18, said earlier that the St Louis County investigation of the shooting could take weeks to complete.
More top news
Elise Christie's Winter Olympics ended in dramatic fashion as she crashed out of the women's 1000m before being disqualified.
Bloating is a sign of ovarian cancer, but a poll has found that some women would be more likely to change their diet than visit their GP.
Jeremy Corbyn met Jan Sarkocy in the 1980's leading a number of questions being asked about the Labour Leader in recent days.