Utøya References Images Utøya island, Norway Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Oslo and Utøya attacks of 2011…shooting on the island of Utøya in Norway on July 22, 2011, in which 77 people were killed—the deadliest incident on Norwegian soil since World War II. Read More…shooting on the island of Utøya in Norway on July 22, 2011, in which 77 people were killed—the deadliest incident on Norwegian soil since World War II. Read More