The Calgary Police Service sex crimes unit is investigating a recent attack on a woman in a northwest park.

According to police, a woman was walking through Riley Park, in the 800 block of 12 Street N.W. between the hours of 11:00 p.m. Sunday and 1:00 a.m. Monday. An unknown man approached the woman from behind and pushed her to the ground. The suspect proceeded to sexually assault the woman.

The sexual assault suspect is described as having a heavy build and is believed to be between 183 cm and 188 cm (6’ and 6’2”) tall.

Anyone with information about the Riley Park sexual assault is asked to contact the Calgary Police Service, 403-266-1234, or Crime Stoppers.