Police are investigating the attempted robbery of a convenience store at Chermside last night.
Just before 9pm, a man armed with a knife entered the Gympie Road business and threatened the male employee.
The man jumped the counter before the staff member was able to lock himself in a back room.
The man has attempted to open the till without success and has left the store empty handed.
He is described as having a medium build, olive complexion, approximately 180cm tall, wearing a white cloth covering his head, a black long sleeve shirt with aqua horizontal stripes, long dark trousers and black joggers.
No one was injured during the incident.
Investigators are appealing for anyone with further information and for two customers who were in the store shortly before the incident, to contact police.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.