FOUR youths were arrested this morning for an armed robbery at a service station in Weston overnight.

Police will allege the four youths, two 13-year-old boys and two male youths, aged 16 and 17, two armed with firearms, entered the Caltex Service Station on Brierly Street in Weston and approached the counter, demanding cash.

They stole the till and cigarettes, and were seen leaving in a silver-coloured Toyota Hilux.

The vehicle was found by police a short time later, abandoned in Tepper Crescent in Kambah. Immediate checks on taxi movements by a Woden police revealed a taxi had picked up four passengers from the same area.

The Woden patrol stopped the taxi in Gordon, and identified the four youths from the earlier armed robbery. They were arrested and taken to City Police Station where they were interviewed by police.

Police recovered the two firearms used by the youths in the armed robbery following a search of the area. 

Witnesses of the armed robbery at the Caltex Service Station in Weston are urged to contact Crime Stoppers on 1800 333 000, or via the website at www.act.crimestoppers.com.au . Information can be provided anonymously.