Police are seeking a man wanted in a sexual assault in Toronto last week.

Around 1 a.m. Wednesday, a 34-year-old woman briefly encountered an unknown man who accompanied her into an apartment building in the Church St. and Alexander St. area, police said.

Once inside the apartment, he sexually assaulted her, police allege.

Police describe the suspect as being in his late 20s to early 30s, 6-foot-3, with a muscular build, short braids, slight facial hair and wearing a baseball cap, grey top and black jeans.