Caboolture detectives are investigating the armed robbery of a convenience store at Ningi earlier tonight.
Around 6.20pm a woman entered the Bribie Island Road store before threatening a female employee with a knife.
The woman obtained a sum of cash before fleeing the scene on foot.
She is described as Caucasian, 178cm tall, with a thin build and sandy blonde wavy hair.
She was wearing a dark grey beanie, hooded baggy grey jumper, and long dark pants.
No one was physically injured during the incident.