Vancouver police are investigating after an 18-year-old woman reported being sexually assaulted Tuesday night in the city's Collingwood neighbourhood.

The teen was canvassing door-to-door for donations in the area of Vanness Avenue and Rupert Street just after 8 p.m. PT, according to a statement from police.

She was pulled into a home and groped by a man, police said.

The woman ran and contacted police, who are now looking into the allegations.