"Elmo's X account was briefly compromised yesterday by an unknown hacker who posted disgusting messages, including antisemitic and racist posts. The account has since been secured," a spokesperson for Sesame Workshop, the nonprofit educational organization behind Sesame Street, said in a statement to ABC News on Monday.

Sesame Workshop confirmed in a statement to Variety on Monday morning that the account had in fact been “compromised by an unknown hacker who posted disgusting messages, including antisemitic and racist posts.” The spokesperson confirmed that the “account has since been secured.”

Sesame Workshop, which makes the children's show, described the string of antisemitic, racist messages posted to Elmo's X account on Sunday as "disgusting."