Authorities described the incident as an ‘extremely cold-blooded act of violence’ but said it was not an extremist act For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Six people have been killed after a gunman opened fire at a shelter for