Harrogate police are appealing to bus passengers to come forward after an incident on the 2A bus to Bilton.
Police say that at around 10.10pm on February 28, an altercation took place in the doorway of the bus before it departed from Harrogate bus station.
A man was heard shouting and behaving in an aggressive manner before physically removing a woman from the bus.
Police are appealing for any passengers or anyone in the bus station at the time who witnessed the incident, to contact them.
Anyone with any information is asked to contact North Yorkshire Police on 101, select option 2 and ask for PC Richard Greenwood. Or email Richard.firstname.lastname@example.org, quoting reference 12140038442. If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.