Toronto police have released detailed descriptions of five men after a teenager was sexually assaulted and robbed at knifepoint early Saturday.

Police say the 17 year old was walking in the Bayview Avenue and Sheppard Avenue East area at about 2 a.m. when she was approached by five men.

The men grabbed her and pulled her into a secluded area, where the sexual assault occurred, police allege.

No one has been arrested.

Police say the first male is black, 18 to 20 years old, and six-foot-two or six-foot-three with a large build, braided hair and facial hair. He was last seen wearing a black/grey baseball cap, a "do-rag," black puffy jacket, and baggy dark jeans with a large shiny belt buckle.

The second male is white or Hispanic, 17 to 19, five-foot-six to five-foot-eight with a medium build, shaved hair, and a clean-shaven face with a piercing on the right side of his nose. He was last seen wearing a black sweater and dark jeans. He was armed with a knife.

Police say the third male is black, 17 or 18 years old and five-foot-six or five-foot-seven. He was last seen wearing a puffy jacket with a hood and dark jeans.

The fourth suspect is white or Hispanic, 17 or 18 and has brown hair, while the fifth male is black, 17 or 18 and five-foot-six to five-foot-eight.

No sketches or photos have been released.

Anyone with information about the incident or the suspects is asked to call police at 416-808-7474 or Crime Stoppers anonymously at 416-222-8477.