Police have arrested a woman following an aggravated robbery at a Glenunga service station this morning.
About 2am a woman allegedly entered the service station on Glen Osmond Road armed with a knife and threatened staff.
The woman walked out of the premises with cigarettes.
No one was physically injured.
Patrols were quick to respond to the area and arrested the woman nearby.
A 43-year-old woman from Fullarton has been charged with aggravated robbery. She was refused bail and will appear in the Adelaide Magistrates Court today.