Police say the robbery happened at 4 a.m. Sunday inside a vestibule in the Kensington Avenue and St. Andrew Street area.
They say a 25-year-old man entered the ATM vestibule and was followed in by three men.
After withdrawing money, police say the victim was pushed, shoved and threatened with a knife and robbed. Police say the suspects fled the scene after the robbery. Police have identified one of the three suspects, but are asking for the public's help in identifying the other two.
In an effort to identify the men, police have released security camera images.
Anyone with information is asked to contact police at 416-808-1400, Crime Stoppers anonymously at 416-222-TIPS (8477), online at www.222tips.com, text TOR and your message to CRIMES (274637), or Leave A Tip on Facebook. Download the free Crime Stoppers Mobile App on iTunes, Google Play or Blackberry App World.