Hundreds of people have observed four and a half minutes of silence to mark one year since 18-year-old Michael Brown was shot dead by a US police officer in Ferguson, Missouri.
The silence began at 12.02pm, the time Mr Brown was killed, with the length of time symbolising the four and a half hours that the teenager's body lay in the street after he was killed.
Two doves were released at the end of the commemoration.
A march is also set to start at the site where Mr Brown, who was black and unarmed, was fatally shot by Ferguson officer Darren Wilson on August 9 2014.
A grand jury and the US Department of Justice declined to prosecute Mr Wilson, who resigned in November, over the incident. The shooting led to a national "Black Lives Matter" movement.