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. $ M4 |: n: O8 Z( \2 Q, z7 @. ]6 d# f- v% ?' B2 s1 Q
They say they are treating it as a "terrorist incident" as they investigate.