Police investigating a number of armed robberies on the Central Coast have charged a man following his extradition from Queensland.

Earlier this year, the Robbery and Serious Crime Squad and Brisbane Water Local Area Command formed Strike Force Bevam to investigate a number of recent armed robberies at chemists and service stations on the Central Coast.

On Monday 3 August 2015, acting on information that a robbery was to occur at a chemist in East Gosford, detectives stopped a car on Ocean View Drive, Wamberal, arresting two men and one woman.

Police will allege they seized a large knife and balaclavas from the vehicle. The trio was taken to Gosford Police Station.

A search warrant was subsequently executed at a home in Albany Street, East Gosford, where police arrested a second woman and seized a number of items of interest to the investigation.

A 26-year-old man was charged with two counts of robbery whilst armed with an offensive weapon in relation to alleged robberies at an East Gosford chemist on Sunday 19 April and Monday 8 June 2015. He was also charged with conspiracy to commit robbery whilst armed with an offensive weapon in relation to the alleged planned robbery on 3 August.

A 34-year-old woman and a 39-year-old man were both charged with conspiracy to commit robbery whilst armed with an offensive weapon in relation to the alleged planned robbery on 3 August. The man was also charged with two outstanding warrants.

A 23-year-old woman was charged with robbery whilst armed with an offensive weapon in relation to the alleged robbery of an East Gosford chemist on Sunday 19 April 2015.

All four are now before the court.

After making further inquiries, detectives made contact with their counterparts in Queensland, who, acting on information provided by Strike Force Bevam, arrested a 19-year-old man in Caloundra on Wednesday (12 August 2015).

The man was extradited to NSW yesterday (Thursday 13 August 2015), and charged with robbery whilst armed with an offensive weapon in relation to alleged robberies at an East Gosford chemist on Sunday 19 April and Monday 8 June 2015.

Refused bail, he is scheduled to appear before Central Local Court today (Friday 14 August 2015).