A quick response by Western District Police led to the arrest of an armed offender at Woodville North this morning.
Police responded to a hold-up alarm at a service station on Torrens Road, Woodville North just before 11am on Wednesday 26 January.
It will be alleged a man entered the service station and threatened the attendant with a knife. He left empty handed and was last seen heading along Woodville Road.
Fortunately, no staff were physically injured during the robbery.
Patrols arrived within minutes and located a suspect nearby in St Clair.
The 18-year-old St Clair man was arrested and will be charged with aggravated robbery. He will be refused police bail and is expected to appear in court tomorrow.