Suspected terror attack at Ariana Grande concert at Manchester Arena

Video shows chaos inside and outside Manchester Arena, in Manchester, England, at the end of an Ariana Grande concert. Police are treating the incident as a terrorist attack. Multiple fatalities and injuries have been reported, and multiple news outlets are reporting that the explosion came from a suicide bomber. Grande was not injured. Grande tweeted: "broken. from the bottom of my heart, i am so so sorry. i don't have words."