Further charges laid over prison drug syndicate

A further three people have been charged over their alleged involvement in a prison synthetic opioid drug ring.

Strike Force Wessex was established to investigate alleged criminal groups involved in drug supply using drug run or 'dial-a-dealer' phones across Sydney.

During the investigation, detectives uncovered an alleged syndicate operating within a correctional centre, involving the supply of Buprenorphine.

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Police arrested a 75-year-old woman at a South Penrith address about 8.30am yesterday.

She was taken to St Marys Police Station, where she was charged with supply small quantity of a prohibited drug and granted conditional bail to appear in Penrith Local Court on September.

Police executed a search warrant about 8am today in Orange, where they arrested a 56-year-old man and 50-year-old woman.

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The pair were taken to Orange Police Station, where they were each charged with supply a small quantity of prohibited drug.

They were refused bail to appear in Orange Local Court today.

Two men, who were arrested earlier this year, remain before the courts.