Regional Investigations Unit detectives have charged a fourth person in relation to an armed robbery offence in Port Kennedy on Wednesday 7 June 2012.

About 12:00am four people entered the store on Fielden Way and approached the counter.

It will be alleged two of the people in the group were armed with hammers, and a staff member at the store was assaulted with both weapons, receiving head and shoulder injuries.

The staff member was taken to hospital by ambulance for treatment to his injuries.

Regional Investigations Unit detectives arrested a 19 year old man (age is at time of incident and arrest) on Wednesday 4 July 2012 and charged him with Aggravated Armed Robbery.

An 18 year old man (age is at time of incident and arrest) was charged with Aggravated Armed Robbery by Regional Investigations Unit detectives on Friday 6 July 2012 after he

was identified as a passenger in a vehicle that had been stopped by the traffic Enforcement Group.

A 17 year old boy (16 years old at time of incident) was charged with Aggravated Armed Robbery by Regional Investigations Unit detectives on Wednesday 7 November 2012 after

returning to Australia from New Zealand a few days earlier.

A fourth person of interest to the investigation was located by Regional Investigations Unit detectives yesterday, Wednesday 14 November 2012, after returning to Australia from New

Zealand a few days earlier. The 17 year old boy from Golden Bay (same age as at time of incident) has been charged with Aggravated Armed Robbery and will appear in the Perth

Children’s Court today, Thursday 15 November 2012.