The Royal Newfoundland Constabulary announced Wednesday the details of a drug trafficking bust that officers say is the largest in the province's history.

The September operation turned up an array of illicit drugs — including 500 grams of fentanyl, which the police force says is enough of the deadly opioid to kill nearly half of Newfoundland and Labrador.

Investigators said counterfeit prescription opioids and other pills were being manufactured in a trailer in the west end of St. John's, where …