A WOMAN dressed in an outfit resembling the movie character Zorro and brandishing a large knife held up a service station in Pooraka this morning.

The woman entered the United service station on Main North Road about 5.20am and threatened the attendant the knife.

CCTV footage shows the offender's face concealed by a black sash, with holes cut out for her eyes.

She was dressed in black leggings, black flat slip on shoes, a dark grey fitted style cardigan and a pale pink handbag worn as a satchel.

The woman fled on foot towards Diagonal Road with an undisclosed amount of cash.

No vehicles were sighted in relation to this offence.

It was one of two service station hold-ups this morning.

At 5.55am, a man wearing a black hooded top with white writing pulled a knife from his sleeve and threatened staff at an Alberton service station.

He fled east on Wellington St with a small amount of cash.

Anyone with information about either incident should contact Crime Stoppers on 1800 333 000 or www.sa.crimestoppers.com.au

Originally published as Servo bandit was dressed as Zorro