Toronto police are looking for four men after a woman was allegedly sexually assaulted in a downtown park early Sunday morning.

The woman, in her 20s, was in the Annex southwest of Bloor and Spadina around 6 a.m. when two men allegedly attacked her in Sally Bird Park while two others kept a lookout, police said.

Investigators said the woman was traumatized, but didn't need hospitalization.

Police describe the four suspects as black and between 28 and 35 years of age. They were wearing blue clothing with various brand name labels.

One suspect was wearing a New York Yankees baseball cap and another man had a blue bandanna tied to his wrist.

Anyone with information is asked to contact police at 416-808-7474, Crime Stoppers anonymously at 416-222-TIPS (8477), or go online at www.222tips.com.