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. G4 u; B3 ]) ^6 E# G
: P( h7 J- M% Q# S* Q" Y4 l, B
They say they are treating it as a "terrorist incident" as they investigate.