Police are releasing photos of a man they say sent a bus passenger to the hospital.

In the afternoon of September 10 near McPhillips Street and Burrows Avenue, a woman in her 20s was riding the bus. Police say a man grabbed her phone and she tried to grab it back. She was then assaulted.

The suspect then fled the bus. The woman was sent to the hospital and treated for injuries.

The Winnipeg Police Service is releasing images of the suspect who they say has a medium build and is in his 30s. He is seen entering the bus in a T-shirt and leaving in a red hoodie. One of the images released shows someone grabbing the suspect as he runs away.

wps bus(Winnipeg Police Service/Supplied)

This is the third reported assault on a Winnipeg Transit bus in one week.