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. : c8 m6 y7 b8 d/ G6 s5 ~$ H/ [0 Q; g, O* ^: |8 V
They say they are treating it as a "terrorist incident" as they investigate.