Police say that 19 people have been killed and another 50 injured after an explosion at the Manchester Arena in northern England, where U.S. pop star Ariana Grande was giving a concert. ! K! y$ e% ?/ N5 V8 }# J+ N% v# @# O3 T O6 A: ]3 l0 l
They say they are treating it as a "terrorist incident" as they investigate.