The service's website displayed a message to potential visitors that read, "We encountered an error processing your request. Please try again in a few seconds."
Gab CEO Andrew Torba didn't immediately respond to a request for comment on when services might return.A Gab Twitter account disappeared from the short-message service. "This account doesn't exist," a page formerly used by Gab read.
Twitter said it didn't take action against the Gab account.Gab, which has previously come under fire for anti-Semitic content, hails itself as a platform for free speech, a self-characterization also used by Parler, the right-wing version of Twitter.
Read also: Parler returns online after monthlong absence: Here's what you need to know