Gunshots were heard on Sunday during a march in Ferguson, Missouri, where hundreds gathered to commemorate the shooting and killing of an unarmed black teenager Michael Brown, police said.
Six gunshots were heard as 300 marchers were on their way to a church in Ferguson to mark the anniversary of the death of Brown, who was fatally shot by a white police officer one year ago.
A police spokesman said one person was wounded when the gunshots were fired, while reports suggest the target of the gunshots were not the marchers.
St. Louis County Police Chief Jon Belmar expressed his anger regarding the shooting.
"These are the exact kind of events we try to avoid. I think it's unfortunate. We are trying to keep everybody as safe as we can," Belmar said.
After 4-1/2 minutes of silence, representing 4-1/2 hours that Brown's body lay in the middle of the street after he was shot, two white doves were released in the air.
A silent march then took place for the honoring of Brown and others who have died due to police violence.
18-year-old Michael Brown was shot dead in Ferguson on Aug. 9, 2014 by white police officer Darren Wilson after a verbal argument with the police officer.
Brown was unarmed at the time of the incident.
Autopsy records indicated that Brown was not shot from long distance, but rather shot in close proximity with six bullets, leaving him dead. His lifeless body was on the ground for four hours.
However, a Ferguson grand jury decided not to indict officer Wilson for his role in Brown's death, causing widespread protests throughout the country.
Last year’s events raised issues about police violence across the country.
According to data compiled by The Washington Post, 385 people have been shot dead by US police during the first five months of 2015.
Of the 385 fatal shootings, only three officers involved were charged.
The hashtag #Blacklivesmatter became popular all around the country as people protested police violence against African Americans.
The latest incident of fatal police shooting took place on Friday, just before the Ferguson shooting commemoration when a 19-year-old unarmed college football player, Christian Taylor, was shot dead by a white Texas police officer after allegedly attempting burglary.