The officer in an unmarked Transit Police car was responding to an emergency call just after 11 p.m. Wednesday near 128 Street and 93 Avenue. 

"When the victim stood up to confront the suspect about not wearing a mask, the suspect allegedly punched the victim in the head, which led to a fight on the bus," said police."

The female suspect allegedly "ridiculed and mocked the teen's ethnicity" and became increasingly aggressive, telling her, "Your smile is making me want to punch you in the face."

The incident, which happened nearly nine years ago, was captured on SkyTrain security video.

A Lower Mainland woman says she was sent a threatening and sexually explicit message from someone on the bus via a smartphone function.

The incident reportedly happened in May, when a 17-year-old girl and her mother boarded a bus near Pacific Centre Mall in Vancouver.

Almost nine years after a UBC student was beaten by Metro Vancouver Transit Police in a violent assault captured on video, Police Act proceedings for one of the two officers involved are still ongoing.

Police are recommending charges of mischief and assaulting a police officer.  

A woman on the bus asked the teenager, who was wearing a headscarf, where she was from and if she was Canadian.

The man looked at the two women and said words to the effect of "go back to your country; that’s where it all started," according to police.