The account of the 3-year-old Sesame Street character turned hateful and certainly not suitable for kids. Here's what the hacked account said.

"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.

The account has more than 650,000 followers and is a reliable stream of wholesome content on a platform where inflammatory rhetoric and abusive messages thrive.