Twitter and other social platforms were facing challenges amid the unrest after President Donald Trump, a fervent Twitter user, had rallied supporters in the capital city as Congress was set to certify the November election won by Joe Biden.
A Trump video clip posted atop his official Twitter account was tagged with a note saying the claim of voter fraud was disputed, and that the tweet could not be replied to, retweeted, or liked "due to a risk of violence."
Facebook did not reply to a query whether the social network is taking any steps to stop from being used to praise or exacerbate the mayhem in DC.
A look at rival social network Parler showed posts lauding the mob assault on the Capitol.
"Disappointing. Pelosi, Schiff, Nadler, Schumer, Romney all got away. DC is a target rich environment," read a post at an @Macholatte account.
"Hope to see some of the DemonRat residences getting torched."
An account from the militia group Proud Boys at Parler posted a photo of a smiling man, apparently in the Capitol building, carrying a podium.
Another Parler post hurled insults at Vice President Mike Pence, including calling him a "traitor" for refusing to overturn the November election results.
Conservatives backing Trump have expanded their online platforms to include alternative social media sites which have refrained from filtering unverified claims.