Four people are facing drug charges after Waitemata Police discovered meth, clan lab equipment and firearms in early morning raids

Two were arrested and charged in Mangawhai Heads - when Police located two kilograms of ephedrine and the ingredients and equipment used for manufacturing meth.

After making enquiries in Massey, officers executed a warrant at a third location in Kumeu - and found clan lab equipment, a loaded double-barrel shotgun, a loaded glock and an unloaded rifle.

Several people were detained and two face charges.

Three people will appear in court today - and a fourth is due in December.