Having to tell other people that someone has died is a very difficult task and even professionals who regularly have to break the news of a death as part of their role never find this easy.
What you say will vary depending both on your relationship to the person you are informing and also on their relationship to the person who has died.
It is best to keep things very simple at the beginning unless the person has died at the end of a long illness and the news is expected. For example, it is better to say that the cause is not yet known rather than guessing the cause and having to correct this information later on.
There are many companies and organisations who will have to be told about the death. Some are more urgent than others. For a full list of who will need to be informed and what you need to do, please click here.