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. 8 ~; F4 _6 I; ]- i$ ]+ W) c% ~4 I, Z. z B+ v* |: A. n( ^
They say they are treating it as a "terrorist incident" as they investigate.