A judge in the US state of Minnesota has ordered a former nurse accused of encouraging suicide on the internet to stay offline. William Melchert-Dinkel, 47, is charged in connection with the deaths of Briton Mark Drybrough in 2005, and Canadian Nadia Kajouji in 2008. He allegedly posed as a female nurse, advising people in chatrooms on how to take their own lives. He reportedly admitted helping up to five people kill themselves.