US President Donald Trump's post contained a video clip, from an interview with Fox & Friends earlier in the day, in which Trump claimed that children are "almost immune" to Covid-19.
The 17-year-old Tampa, Florida resident was arrested last week along with two others, aged 19 and 22, for hijacking dozens of high-profile Twitter accounts last month.
The three were charged over their roles in hijacking celebrity Twitter accounts and tricking people out of money.
Prosecutors believe a Saudi citizen linked to the royal family recruited two former Twitter employees to access internal data about users.
Under the new law, social media giants such as Facebook and Twitter will be required to designate representatives for investigations and legal proceedings relating to offences on their platforms.
Ahead of a major anti-trust congressional hearing on the four corporate giants, their leaders have expressed positive sentiments that fly in the face of past hearings.
The hack has raised questions about Twitter’s security as it serves as a megaphone for politicians ahead of November's election.
An independent civil rights audit of Facebook found the social network has not been able to protect its users and urged it to build a “civil rights infrastructure” into all aspects of the company.
The non-binding guidelines apply to social platforms where audiovisual content is seen as an essential. EU countries have until September 19 to implement the rules.
Organisers of a Facebook Inc advertising boycott campaign that has drawn support from a rapidly expanding list of major companies are now preparing to take the battle global to increase pressure on the social media company to remove hate speech.
That European consumer-product maker, Unilever, said it took the move to protest the amount of hate speech online.
Facebook CEO Mark Zuckerberg had previously refused to take action against President Donald Trump's posts suggesting that mail-in ballots will lead to voter fraud, saying that people deserved to hear unfiltered statements from political leaders.
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