Tony Gallagher is no longer editor of the Daily Telegraph, sources with knowledge of the situation told BuzzFeed.
It is understood that Chris Evans, currently the Telegraph's assistant editor, will take over.
A source said that Ian MacGregor, currently Sunday Telegraph editor, is set to take over as acting weekend editor.
There was a meeting for senior staff at approximately 12.15pm this afternoon to tell them the news.
A source said that individual desks were then brought in to hear the news: "He was banged out and it was all over in fifteen minutes."
(Banging out is a British newspaper tradition, in which staff make noise to mark the departure of a respect journalist.)
A Daily Telegraph journalist told BuzzFeed: "Tony Gallagher was respected and feared. Chris Evans has one of those qualities."
"Tony Gallagher called all of his section editors into the office to say goodbye at the 12.15pm meeting. He was very emotional," they added.