A 15-year-old girl was stopped from getting off at her bus stop by a man holding a knife near the Morningside Drive and Cumber Avenue area on Tuesday.
The man forced her to a nearby apartment building and sexually assaulted her.
Police say they are looking for a black, dark-complexioned man in his early 20s. He is described as 5-foot-10 to 5-foot-11, muscular, and having shoulder-length cornrows.
A 19-year-old woman also reported being sexually assaulted at Lakeshore Boulevard West and Islington Avenue yesterday afternoon.
A man approached her from behind and led her to a secluded area and assaulted her, also at knife-point.
The man fled when a female passerby approached the scene.
The suspect is described as olive complexioned, 5-foot-9 to 5-foot-10 with a stocky build.
Both attacks occurred between 3 and 3:30 p.m.