Six people arrested in a series of raids earlier this week have been charged in connection to last year's violent robbery of an armoured truck, police said on Friday.

Toronto police confirmed that a series of pre-dawn raids executed on Thursday resulted in the arrest of six people who are believed to have stolen $1 million from an armoured truck.

A dozen search warrants were executed on homes in Toronto as well as the Regions of York and Durham, resulting in the combined arrests of 13 people.

Staff Insp. Mike Earl of the Toronto police hold-up squad said six of those people have been charged in connection to the armoured truck robbery.

Another seven people were arrested and face charges associated with the trafficking and possession of narcotics.

During the series of raids, police recovered a Glock 17 that was taken from one of the guards at the time of the truck robbery. Another handgun stolen during the robbery has not been recovered.

Police said 800 grams of cocaine, 200 grams of ketamine and 240 grams of crystal meth was also seized in the raids.

Police continue to search for another suspect connected to the Nov. 18, 2011 armoured truck robbery.

Lee Ming, who also goes by the names Anthony Lee and Jason Smith, as well as the nickname "Legal," is still wanted by police.

More than $1 million was stolen from a Garda armoured truck outside a bank in Scarborough, in what police described as a professional and organized attack.

"Armoured car robberies are very rare," Earl told CP24 on Friday. "They are the most violent robberies out there. You have armed suspects taking down guards that are armed with handguns. The potential for violence is extremely high."

Police said they believe that at least some of that money has been funnelled into the narcotics trade.