Police were called to an Oaklands Road service station about 5.45am on Wednesday 6 September after a man entered the store with a hammer and jumped the counter.

The man was grabbed by a member of the public as he tried to run out of the store empty handed and held him until patrols arrived. A second male was seen waiting outside the service station who ran off soon after the man was apprehended.

Patrols cordoned off the area and searched for the second suspect with the assistance of Dog Operations officers and PD Ink, who was last seen running east on Oaklands Road.

The second suspect was not located at the time however subsequent investigations led police to a Largs North home where he was arrested.

A 19-year-old man from Park Holme and a 17-year-old boy from Largs North were charged with aggravated robbery and they will both appear in the Adelaide Magistrates Court today.