Toronto police are investigating another attack that took place on the city's transit system.

Police say officers were called to the Toronto Transit Commission's Eglinton West station bus terminal at 2 a.m. Sunday for reports of an assault.

Police say a man forced his way into the station and assaulted a TTC employee after being told buses were no longer running.

The suspect is described as a man between 35 to 40 years old, about five feet 11 inches tall with a medium to heavy build, a dark moustache and eye glasses.

He was last seen in a dark blue jacket, faded blue jeans, white "Puma" shoes, a yellow baseball hat and carrying a maroon gym bag.

The attack comes as the TTC deals with a recent wave of violence against passengers and staff, prompting the transit authority to deploy additional employees to move throughout the system each day.