The alarm came at 6.30 pm and according to the police it is unclear what happened during the assault, but the bus driver was injured and taken to hospital.
It is unclear what injuries the driver has received.
- No shelters have been used, we know that much, says Evelina Olsson, press spokesperson for the police.
The perpetrator disappeared on foot after the incident.
- We have patrols looking for him, says Evelina Olsson.