A third child has died after a knife attack at a Taylor Swift-themed dance class in north west England.<br /><br />The girl, aged 9, died in the early hours of Tuesday morning.Two other girls aged 6 and 7 died on Monday. <br /><br />Five other children and two adults remain in a critical condition. <br /><br />Singer Taylor Swift has said the knife attack at a dance workshop themed around her music has left her "completely in shock". <br /><br />A 17-year-old boy, from Banks in Lancashire, has been arrested on suspicion of murder and attempted murder. <br /><br />Subscribe here: <br /><br />For more news, analysis and features visit: @topheadlinelive <br /><br />#Southport #TaylorSwift #BBCNews
