Police have charged two 14-year-old Inala boys and a 17-year-old Boondall woman following an alleged robbery at Fortitude Valley this morning.

It will be alleged at about 1.10am the boys attended a store on Brunswick Street armed with a knife and demanded cash and cigarettes.

The pair left the store with a sum of money and cigarettes, before leaving in a taxi with a woman and a girl.

The store attendant was not physically injured.

A 17-year-old woman has been charged with one count of wilful damage of police property and is expected to appear in Brisbane Magistrates Court on April 30.

Both boys have been charged with one count each of armed robbery in company and will be dealt with under the provisions of the Youth Justice Act.

Investigations are continuing.