CNN says it has fired an editor after finding examples of plagiarism in about 50 of her stories.

The company said it had terminated Marie-Louise Gumuchian, who reported from CNN's London bureau about Africa, Europe, and the Middle East, in an editor's note published Friday.

It said it had removed plagiarized passages from some articles, and deleted some altogether. CNN “Reliable Sources” host Brian Stelter tweeted a link to the note Friday morning.