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. 0 A4 q3 u0 S0 E" @" b8 }6 z
% s6 [3 M$ k5 @7 y) dThey say they are treating it as a "terrorist incident" as they investigate.