Twenty Two people have been killed and more than 50-injured in an explosion at Manchester Arena in the United Kingdom. The blast happened last night, following a pop concert by the US singer Ariana Grande. British Prime Minister Theresa May has send condolences to the affected families. She described the incident as a terrorist attack. Paramedics at the scene had to treat some of the wounded for shrapnel-like injuries. North West Ambulance Service said it had taken 59-casualties from the explosion to hospitals and treated a number of people who were wounded, but able to walk. Unconfirmed reports from two unnamed US officials suggest the attack was carried out by a suicide bomber. Shortly after the blast the station was closed and all trains cancelled.