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A man who attacked a woman in Mount Pleasant is still at large.

And Vancouver police are hoping that another man who helped the victim might be of some assistance in solving the case.

The incident occurred just after midnight on December 15 when the woman was walking on Main Street near East 17th Avenue.

The assailant grabbed her and committed sexual assault, according to the VPD.

But when a man offered to help the woman, the suspect ran away in a western direction.

The perpetrator has been described as 5'6" with bulging eyes, a stocky build, and dirty hands.

The VPD says he was wearing a black puffy jacket on top of red fleece.

The good Samaritan accompanied the woman to her home, but police don't know his identity.