The thieves drilled through the walls of an empty building in Lincoln Park to reach a bank vault next door, according to the FBI.
The agency did not say how much money the thieves robbed from Bank of America at 2163 N. Clybourn Ave. Sunday morning.
The theft occurred between 12:30 and 06:00. The FBI says it is looking for two to four men, one of whom is wearing the signature blue shoes. They escaped in a small silver SUV and a black sedan.
No one has been reported detained. Anyone with information can call (312) 421-6700 or contact tips.fbi.gov.