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. 1 i; K/ n% I1 a7 N( k+ f% L0 Q7 G& F6 a3 n# z' B V0 s- s
They say they are treating it as a "terrorist incident" as they investigate.