Head of the Association of Chief Police Officers, Chief Constable Andy Trotter has said threatening messages sent via Twitter are "disgraceful" and will be taken seriously by police:
More top news
A number of Britons are feared stranded on Mount Everest after the Nepal earthquake triggered a deadly avalanche on Saturday.
Prime Minister defends royals' decision to give birth in a private hospital - instead of going with the NHS
Tech giants Facebook and Google both have simple, powerful tools to help friends and family keep track of loved ones