The official X account of Elmo, one of Sesame Street’s most cherished characters, was hijacked on Sunday by unknown hackers who posted a barrage of hateful and conspiratorial messages.

A hacker shared a string of racist and antisemitic posts from the social platform X account of Elmo, the fuzzy red monster from “Sesame Street,” the owner and producer of the children’s show said Sund...

“Elmo’s X account was compromised by an unknown hacker who posted disgusting messages, including antisemitic and racist posts,” a spokesperson for Sesame Workshop, the makers of “Sesame Street,” told...