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. 3 ?, f2 X/ N5 r# K0 I0 ^3 q
/ {/ R8 a/ Q5 }9 oThey say they are treating it as a "terrorist incident" as they investigate.