The arrests, along with two more in Sydney last week, were made by officers attached to Strike Force Frederica, which was established by the Central West Police District in May, 2017 to investigate the supply of methylamphetamine.

Police also found and seized cash, drugs, ammunition and weapons in their three-day Orange sting.

A 34-year-old woman was arrested at a home on Spring Street on Thursday and was taken to Orange police station, where she was charged with supplying an indictable quantity of a prohibited drug, and two counts of supplying a small quantity of a prohibited drug.

On Wednesday a 61-year-old man was arrested following a vehicle stop on Bletchington Street. During a search of the vehicle, police uncovered drugs, a mobile phone and cash.

He was taken to Orange police station and charged with six offences, including four counts of taking part in the supply of prohibited drugs, and two counts of possessing prohibited drugs.

A search warrant was also executed at a home on Spring Street, during which police found drugs, ammunition and a sword.

On Tuesday a 22-year-old man was arrested at Orange police station and charged with three counts of supplying a small quantity of a prohibited drug.

The woman and 61-year-old man were refused bail and faced Orange Local Court on Thursday, where she was refused bail again to reappear on Monday. The 22-year-old man was granted conditional bail to appear in court on Monday.

Their arrests follow two more, one of which will lead to an Orange court date next month.

On Friday a 36-year-old man was arrested at a home at Cranebrook and was taken to Penrith police station and charged with supplying a small quantity of a prohibited drug, and supplying a prohibited drug.

He was granted conditional bail to appear at Orange Local Court on September 24.

On Thursday police arrested a 37-year-old man at Silverwater and charged him with 17 drug supply offences, including 12 counts of supplying an indictable quantity of a prohibited drug, and supplying a commercial quantity of a prohibited drug.

He appeared at Parramatta Local Court on Friday where he was bail refused to reappear at Katoomba Local Court on October 22.