A 26-year-old woman remains in custody after a man was assaulted on a bus in Norwich this morning.
Officers were called to Surrey Street shortly after 8.20am following reports a man had been assaulted by another passenger with what is believed to be a pen knife.
The victim, a 61-year-old man, suffered a minor cut to his head and officers detained a woman at the scene.
The suspect was taken to Wymondham Police Investigation Centre where she will be questioned.
A number of people were on board the bus at the time of the incident and no one else was injured.