Armed raiders threatened staff and demanded cash at a Royal Bank of Scotland branch at lunchtime.
Police Scotland said the gang launched the raid on the RBS branch in Tollcross in Edinburgh around mid-day and although staff were unhurt they were left shocked.
It is unclear at this stage whether the raiders managed to escape with cash.
Detective inspector Stuart Harkness said: "Police were called to a report of a robbery at RBS in Tollcross, Edinburg, at 12pm today.
"A number of armed men entered the building and demanded cash.
"No one was injured during this incident, however this was a frightening and intimidating experience for the staff and members of public at the branch.
"Enquiries are continuing and anyone with information, or who witnessed this robbery, should contact."
A cordon was placed at Home Street and Lochrin Terrace while the investigation was carried out.
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