VANCOUVER - Six people have been charged with multiple drug offences after a lengthy investigation by the Vancouver Police Department.

Police say the suspects are part of a sophisticated network that distributed drugs in the city, on Vancouver Island and into Alberta.

The seven-month investigation included the seizure of $575,000 in cash, multiple firearms, heroin, cocaine, methamphetamine and nearly 24,000 fentanyl pills.

Eight vehicles and almost $3.8 million in property was also seized, including an apartment in Vancouver, a townhouse in New Westminster and a house in Coquitlam.

The investigation culminated in the arrests of Dennis Halstead and Jason Heyman, both 36, Tara Marshall and Pedro Keymatch, both 32, and Cameron Mak and Charleen Flintroy, who are in their 40s.

The suspects are charged with various trafficking and firearms offences.