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. / o0 c! a8 v/ T5 V. T1 a4 A& I! W* _, K2 ?# e% q! z2 M4 t
They say they are treating it as a "terrorist incident" as they investigate.