of a 23-year-old man in the area in connection with the attack. but after attacks we see numerous arrests, numerous raids and sometimes they don't end up in charges in connection with an attack. so we'll have to wait and see whether this individual that is in custody had any kind of relation. we'll have to see what they found at these various addresses that they have searched since the attack. this is a fast ongoing investigation. there's been a lot of forensic work done at the scene of the attack in terms of trying to figure out just how sophisticated the device was, just how powerful it was, what kind of bomb making chemicals were inside. and all of that provides clues about whether this was likely that individual acting alone or whether he might have been part of some wider network. the more sophisticated the device, the more powerful the