Detectives have charged two people following investigations into an armed robbery in Norman Park overnight.

It will be alleged shortly after 7pm a man entered a Bennetts Road supermarket armed with a knife and demanded money from a staff member behind the counter.

The 17-year-old male employee complied and the man fled the store along Macrossen Street with a sum of cash.

The man was seen getting into a vehicle before it sped off.

No one was injured during the incident.

A short time later police were able to track the vehicle to a Morningside address where they arrested a 17-year-old boy and 18-year-old man.

The 17-year-old Carina boy has been charged with one count of armed robbery.

The 18-year-old Morningside man has been charged with one count of armed robbery also.

He is expected to appear in the Brisbane Magistrates Court today (June 20).