Comedian Jon Lovitz used Twitter to expose three teenage girls behind an anti-Semitic prank on his friend's daughter.

"Some coward & idiot left this on a friend's doorstep, yesterday. This is an insult to all of us," he tweeted on April 5, attaching a photo of the vandalism, which showed swastikas drawn with maple syrup on the sidewalk of his friend's house, and a pile of feces on his doorstep.

Lovitz' friend's daughter was classmates with the girls who perpetrated the act. The girls admitted they were behind the vandalism, but since their work was not permanent, the police said they could not press charges.

Lovitz, 54, then tweeted a photo of the girls.

“Let them be famous as Jew haters. Pls RT,” he wrote to his 28,000 followers. ("RT" stands for "retweet.")

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Unlike the police, the girls' school could take action, and expelled all three.

“UPDATE!!!! The three girls who vandalized my friends home with swastikas and dog crap, have been expelled from their school permanently,” Lovitz tweeted April 9.

While the girls were not charged, police are investigating one of their mothers, who allegedly drove the girls to and from the home they vandalized.