Police investigating the fatal stabbing of 16-year-old Christina Edkins have confirmed they are not looking for anyone else in relation to the incident.
It follows the release of a CCTV image of the man they arrested. Police are asking people in Birmingham who saw the man yesterday morning to come forward and tell them what they saw.
A 22-year-old man was arrested in connection with the fatal stabbing of a "bright and popular" teenager on a bus as she travelled to school.
West Midlands Police have launched a manhunt after a 16-year-old girl was fatally stabbed on a bus in Birmingham on her way to school.