Police are currently at the scene of an aggravated robbery that occurred at a business overnight.
At 1.30am police were called to a BankSA branch on Sturt Road after reports a man armed with a knife confronted and threatened a cleaner as he was leaving the building.
The offender then allegedly entered the bank and left shortly after taking a small bag containing documents.
No one was physically injured during the incident.
Police searched the area with the assistance of a police dog but were unable to locate anyone.
Sturt CIB and crime scene will be attending the bank this morning to continue the investigation.