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. . l5 |7 w+ Y2 ~% v3 h$ z% G. G" g8 N& K7 s1 c. O& _4 N9 a% l
They say they are treating it as a "terrorist incident" as they investigate.