A North Korean court sentenced two South Korean journalists and their publishers to death for "seriously insulting the dignity" of the country by reviewing and interviewing the British authors of a book about life in the North, its state media said on Thursday.

North Korea has previously issued harshly worded accusations against South Korean entities and individuals for allegedly violating its dignity, by slandering its leadership and its political system.

The book in English titled "North Korea Confidential" was authored by James Pearson, a Seoul-based correspondent for Reuters, and Daniel Tudor, former correspondent in South Korea for the Economist magazine.