May raise the uks Terror Threat level. The threat level should be increased for the time being, from severe to critical. A further attack may be imminent. Reporter she said the investigation may suggest there may be a wider group involved. More than a dozen people are still reportedly missing. More than 24 hours after this deadly terror attack. Tina, we understand it is still up in the air as to whether he was part of a bigger group. Do we know if the bombing suspect was at the scene by himself . Or might there have been other people there . Reporter that is exactly what investigators are trying to figure out. This was a local man who attended a mosque in manchester, but a moderate mosque, not radical. How did he become radicalized . Are there other people behind him . Was he a lone wolf or was is part of a larger terror plot . These are things police are trying to get to the bottom of tonight. Now we are learning more about the victims killed in the attack. Veronica de la cruz joins u