A Hamilton police officer is among the 21 people arrested in what's being described as the province's largest-ever crystal meth bust.

Hamilton police put 26 kilograms of methamphetamine on display for the media at a Thursday morning news conference. They also seized steroids, cars, cash and other drugs.

The seizure was the result of raids at 23 homes and businesses by some 175 police officers in Hamilton, Niagara, Peel, Haldimand County and Sudbury. It came at the end of an 18-month investigation dubbed "Project Newton." 

The total value of the seizures — including $140,000 in cash — is estimated at $4 million. The 21 who were arrested face a total of 93 charges, including possession of the proceeds of crime, conspiracy to traffic anabolic steroids and trafficking cocaine and ketamine.

The investigation is ongoing and further charges are expected.