Detectives have charged three people over multiple alleged armed robberies across Sydney’s west.

Since April 2015, six armed robberies occurred in the Mount Druitt, St Marys and Blacktown local area commands.

The robberies, involving two to four armed offenders, took place at licensed premises, pizza stores and service stations.

Detectives from the Metropolitan Robbery Unit and Mount Druitt Local Area Command formed Strike Force Goode to investigate the six incidents, which are believed to be linked.

Following inquiries, police stopped a grey Hyundai sedan on North Road at Rooty Hill on Sunday (10 May 2015).

During a search of the vehicle police located and seized a replica pistol and a large silver knife.

The occupants – three males aged 58, 21 and 17 – were arrested and taken to Mount Druitt Police Station.

The 17-year-old, from Hebersham, was charged with five counts of robbery armed with a dangerous weapon and conspiracy to commit robbery while armed with a dangerous weapon.

He appeared in court yesterday where he was remanded in custody to appear in a children’s court on Friday (15 May 2015).

The 21-year-old was charged with robbery while armed with an offensive weapon and conspiracy to commit robbery while armed with an offensive weapon.

The 58-year-old was charged with one count of conspiracy to commit robbery while armed with offensive weapon.

The men, both from Hebersham, appeared in court yesterday and were remanded in custody to appear at Penrith Local Court on Friday 26 June 2015.

Inquiries by Strike Force Goode detectives continue and investigators are appealing for anyone with information to come forward.