Metro Vancouver Transit Police say two people have been charged for their alleged roles in a “sophisticated” drug trafficking operation that involved distributing fentanyl in the form of dog treats.

In a press release issued Tuesday, police said they became aware of the two suspects, who were allegedly selling illegal drugs in the Surrey area last spring.

“It was quickly determined that the suspects posed a serious risk to public safety due to their access to firearms and fentanyl disguised to look like dog treats,” it reads.

As part of the investigation, Metro Vancouver Transit Police said they seized 3.4 kilograms of fentanyl, 28.7 grams of cocaine, five firearms, body armor, nearly $37,000 in cash, a 2019 Volkswagen Jetta, a diamond necklace and a diamond ring.

“The volume of fentanyl seized was equivalent to nearly 2 million lethal doses, which is alarming, given that we are in the midst of an opioid crisis in British Columbia,” said Const. Amanda Steed in the press release. “Processing it using molds designed for dog treats meant this potentially deadly substance was disguised to make it appear harmless to anyone who encountered it.”

Additionally, a man and woman, both from Surrey, have been charged with several offenses related to drug and firearms trafficking, police said.

One suspect was released under conditions, including a 24-hour house arrest, and the other remains in custody pending his next court appearance, according to the department.