After investigations into a robbery in Port Macquarie earlier in the day, police pulled over a vehicle on Park Street, Port Macquarie about 1.45pm Thursday.

A 30-year-old man was arrested at the scene, with police allegedly locating a small amount of amphetamine in his possession.

Additional information prompted police to attend Crisallen Street home in Port Macquarie, where - after a short operation - an 18-year-old man was arrested.

Police then searched the premises allegedly finding a replica pistol, as well as an amount of alleged stolen property and a small amount of cannabis.

He was taken to Port Macquarie Police Station where he was charged with robbery with an offensive weapon, take and drive conveyance, possess prohibited drug and breach of bail. 

The 30-year-old man was charged with two counts of possess prohibited drug and breach bail.

They were both refused bail after appearing in Port Macquarie Local Court on Friday and will re-appear before the Magistrate on September 24.