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. - c$ u/ h2 _; {, S. G) v! k4 c
* v1 q5 \/ t( M g) L- c7 ]9 W" O# HThey say they are treating it as a "terrorist incident" as they investigate.