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 q5 {+ x K% q3 |2 p: i
+ k! t8 O. ]4 }! d* {! a [They say they are treating it as a "terrorist incident" as they investigate.