A short time ago Western Adelaide CIB Detectives arrested three male teenagers following the alleged armed robbery of a Rosewater service station overnight.
Police have charged an 18-year-old man from Ottoway, and two 17-year-old boys from Rosewater with aggravated robbery.
The man has been refused police bail and will appear in the Port Adelaide Magistrates Court later today.
The two youths were bailed to appear in the Port Adelaide Youth Court at a later date.