Thirteen people have been charged over a "sophisticated" ice syndicate busted in Melbourne.
More than 100 police raided 12 properties across northwest Melbourne from 3am on Wednesday after a year-long investigation into the trafficking of methamphetamines, or ice, with alleged links to organised crime groups.
As well as ice, officers also seized cannabis, cocaine, ecstasy, steroids, firearms, ammunition, cash, and stolen goods including a motorcycle and jewellery from the properties in Sydenham, Taylors Hill, Airport West, Pascoe Vale, Keilor, Caroline Springs, Albanvale and at a factory at Ravenhall.
"They are quite sophisticated and versed in investigative techniques and so they're very good at concealing the way they operate," Acting Assistant Commissioner Peter Brigham said.
The syndicate had been supplying ice to other dealers in Melbourne for a "significant" time, police will allege.
All 13 people who were arrested were charged by Wednesday night.
A 58-year-old Sydenham man faces a charge of trafficking a large commercial quantity of drugs of dependence, two charges of being a prohibited person possessing a firearm, possessing proceeds of crime and has a remand application pending.
Four men aged 29, 27, 47 and 52 were all charged with trafficking a commercial quantity of a drug of dependence and have remand applications pending.
Four men aged 26, 31, 37 and 61 and a 37-year-old woman all face drug of dependency charges and were bailed to appear in Melbourne Magistrates Court on October 10.
A 36-year-old Sydenham man was charged with possessing a drug of dependence, possessing ammunition and handling stolen goods and was bailed to appear at the Melbourne Magistrates' Court on October 8.
A 57-year-old Keilor Downs man was bailed on a possessing a drug of dependence charge to reappear at Melbourne Magistrates Court on November 10.
And a Taylors Hill man, 33, was charged with trafficking and possessing cocaine, MDMA and steroids, possessing the proceeds of crime and possessing a prohibited weapon and bailed to appear at Melbourne Magistrates Court on November 21.