Police in riot gear, supported by an armoured SWAT vehicle and a helicopter overhead, repeatedly ordered a crowd to disperse in Ferguson, Missouri.
They then fired a volley of tear gas just after 11pm (5am UK time), sending the crowd fleeing, it was reported.
More top news
Cuts to local services will continue across many towns and cities in the UK, despite council tax bills rising by up to 5% this year.
Monday will be windy and mild, with some sunshine across central and southern parts once the morning mist and murk clears.
Malaysia has recalled its ambassador to North Korea as tensions over the investigation into the death of Kim Jong-nam boiled over.