A 14-year-old girl was stabbed on a bus as she was travelling home from school in Birmingham.
The teenager was attacked by a group of girls on the number 94 Chelmsley Wood bus near to Millennium Point in Digbeth on Tuesday.
The victim from Kingshurst, Solihull, was taken to hospital with minor back injuries. She was treated for a puncture wound before being discharged.
A 14-year-old girl is in custody after being arrested on suspicion of robbery.
Police say a group of girls were seen running from the scene shortly after the girl and her friends were attacked at 1630 GMT. A knife was also recovered.
The bus driver called for assistance after stopping outside Millennium Point.
Officers are investigating two reported robberies and an assault with intent to rob.
CCTV footage from the number 94 service is being examined.