Photo: Herald Sun

Investigators have been told a group of males attended at a service station on Heaths Road in a stolen Ford about 4.30am.

Three males with hammers got out of the Falcon, forced entry to the service station and stole cash and cigarettes before fleeing in the car.

Geelong police arrested three youth in the Ford in Norlane about 5.40am.

The two 16-year-olds and a 17-year-old remain in custody assisting police with their enquiries.

Police are yet to establish how many offenders were involved in the armed robbery and continue to investigate the incident.

The Ford was stolen during an aggravated burglary in Geelong on 25 September.

Anyone with any information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.