Is the new movement against gun violence that is sweeping America too white and too rich?
Protesters are being accused of hypocrisy, as some ask why they didn't turn out for the Black Lives Matter movement, which was set up in 2013 to end police violence against black people and highlight the impact of gun violence in ethnic minority communities.
In 2016 more than 52% of murder victims (73% killed by guns) in America were black, even though black people make up 13% of the population.
Debate on Twitter focused on a photograph of white protesters holding up their palms, which read: "Don't shoot." The slogan and gesture became a rallying cry in 2014 after 18-year-old Michael Brown, who was reported to be raising his arms, was fatally shot by a white police officer in Ferguson, Missouri.
Accusations that the weekend marches had appropriated the slogan were shared more than 3,000 times.
"Where were y'all when black people were getting shot though? If gun control don't include police and your protesting doesn't include innocent black people, I do not want it!" tweeted @frankpuddles.
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"Oh, what's that Never Again? Oh, 30 people were killed in Chicago since the march," wrote @MrRidiculous4.
However, others highlighted that black and Hispanic students had given speeches at the March for Our Lives.
So glad to see all these black and brown kids given an opportunity to speak up too! Much respect to the Parkland students for using their privilege to give others space to speak and get some spotlight. #Hope #BlackLivesMatter #MarchForOurLives #VoteThemOut2018— JJ Odelle (@JJOdelle) March 24, 2018
"More than half of the speeches were for BLM and the minorities who are the majority of gun violence survivors. Did you guys even go or watch? It's such an inclusive movement against all gun violence," tweeted @onegirlpizza, who conceded that using Black Lives Matter slogans was "inappropriate".
Race was also the subject of signs posted online with the Black Lives Matter hashtag.
Black Lives Matter activists posted on Instagram their stories from the march, focusing on the two movements working together.
"We organised almost 1,000 students in less than 10 days from over 24 diff[erent] cities. I work with black youth who live in cities with real everyday stories on gun violence. Fourth Graders to college were so beautifully brave and focused today," wrote @tiffanydloftin.
I said it over and over. This was not an event. It was a moment to organize, educate and recruit. That’s exactly what we did. We organized almost 1,000 students in less than 10 days from over 24 diff cities. I work with Black youth who live in cities with real EVERYDAY stories on gun violence. 4th graders to college were so beautifully brave and focused today. Grateful for the job let’s me do what I love. Thank you y’all! Safe travels home ✊🏾🙏🏾 #ENOUGH #marchforourlives #blacklivesmatter #guns #kids #naacpnow
Some critics suggested that Never Again has attracted so much attention because of the race and economic background of its founders, who are students at the Marjory Stoneman Douglas high school in Parkland.
"The Never Again movement has been spearheaded by white teens - that's why it's garnered so much attention," tweeted @gideonsvid.
"Families of black victims called for an end to violence, but that did not receive widespread media coverage. Black victims, whether victims of neighbourhood violence or otherwise, have not received the support that white victims have received," said one Instagram user, referring to a picture of a man holding a sign reading: "Black students matter."
The issue of perceived disparity in media attention was raised by Naomi Wadler, 11, at the March for Our Lives rally in Washington DC. She co-led a walkout from her school last week and said she represented black American girls ignored by the media and suffering from gun violence.
Never Again founder David Hogg also said black survivors in his school, where 25% of the pupils are black, had not received the same media platform as himself and other teenagers.