A double-decker GO bus hit an overpass at Kitchener's Charles Street Terminal on Friday, becoming wedged in.

The crash happened at about 9:45 a.m., with four passengers and the driver on board. None of them were hurt, Metrolinx officials said, and the bus was removed by about noon.

"The bus is wedged under there. Mechanics are going out now to get the bus out. I think they're going to deflate the tires slightly so they can get the bus out," said Anne Marie Aikins, a spokesperson for Metrolinx.

Aikins said a full investigation is underway with Waterloo Regional Police Service and transit safety workers.

She said they'll try to determine why and how the crash happened.

Aikins said no service disruptions are anticipated.