Three men have been charged and appeared in court today after a series of drug raids across Christchurch by police yesterday.

The Canterbury Organised Crime Unit claimed after the raids to have cracked an alleged methamphetamine supply ring.

Methamphetamine worth almost $500,000, along with cash, motor vehicles and synthetic cannabis were seized, Detective Sergeant Phillip Sparks said.

Concrete worker Michael Heron, 44, builder Riki William Wellington, 26, and 23-year-old security officer Luke Samuel Mathers - all of Christchurch - appeared from custody at Christchurch District Court this morning.

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All three men are accused of being in possession yesterday of the class A drug methamphetamine and synthetic cannabis, a psychoactive substance, with the intent to supply.

Heron and Wellington have also been charged with possession of a pistol. Wellington is accused of damaging a vehicle on Tuesday.

Mathers had an application for bail refused by Judge Brian Callaghan this morning.

Mathers, Heron and Wellington were all remanded in custody without plea to November 24.