Xplore Dundee was forced to withdraw bus services as firework-hurling yobs caused havoc last nights.
One driver was left injured amid as thugs threw missiles at buses.
The anti-social behaviour began at around 6.30pm in Whitfield, which has previously been plagued by youths lobbing objects at moving vehicles.
A halt was called on routes 9/10 (outer circle) and 33 (city centre to The Crescent) after serious safety concerns were raised on Wednesday evening.
It is understood that troublemakers had been throwing “missiles” at the vehicles including eggs and fireworks on Lothian Crescent.
The firm later said that another vehicle had been temporarily withdrawn from the 28/29 service which operates from Douglas to Ninewells Hospital and Myrekirk ASDA.
A statement on Xplore Dundee’s Twitter page said: “There are further reports of objects (ranging from eggs to fireworks) being thrown at buses in areas across Dundee.
“This is dangerous and careless behaviour. It has resulted in a bus being temporarily withdrawn from services 28/29, due to a driver being injured.
“Our drivers deserve to work in safe conditions, and our passengers deserve to travel safely too. All incidents of anti-social behaviour are being raised with local police.”
A Police Scotland spokeswoman said that officers were sent to the scene but the troublemakers had fled.