A passenger abused a bus driver and knocked his glasses from his face after an argument.
The man stepped on to the 53A Arriva bus in Humberstone Gate, in the city centre, at about 5.40pm on Sunday, September 30, police said this week.
He became abusive towards the driver and grabbed him, knocking his glasses off.
The man then ran off along Humberstone Gate towards St George's Retail Park.
The passenger is white, aged between 45 and 50, about 5ft 10ins and of medium build.
He had short, black hair and was wearing dark clothing.
Police have issued a CCTV image of a man they wish to speak to about the incident.
Pc Ian Line, who is investigating the incident, said: "Thankfully, the bus driver was not left with any serious injuries."
Call police on 101, or contact Crimestoppers on 0800 555 111.
