Toronto police say they believe the two shootings are connected.
On Tuesday, police were called to 2063 Islington Ave., north of Dixon Road, to investigate a shooting.
At the scene, police found 21-year-old Ahmed Siyad suffering from gunshot wounds.
Siyad was taken to hospital with non-life threatening injuries.
On Tuesday evening, police cleared the scene and then were immediately called back to investigate a second shooting that occurred around 8:15 p.m.
A man was rushed to hospital with life-threatening injuries.Police say he died in hospital on Thursday afternoon.
Police have identified the deceased as 22-year-old Malcolm Marfo.
Anyone with information is asked to contact Det.-Sgt. Gary Giroux at 416-808-7400, ext. 77387, or Det.-Sgt. Mike Patterson at 416-808-7400, ext. 77394.
Information can also be passed on anonymously through Crime Stoppers at 416-222-8477.