Sarnia police are warning about a new synthetic opioid that was confiscated during a drug bust in late April.
The pills, found at a home on Aamjiwnaang First Nation during a search warrant, were initially thought to be oxycodone tablets.
At the time, a 32-year-old man from Aamjiwnaang First Nation, who is accused of shooting another man through both legs, was arrested on numerous charges.
Police said after being analyzed by Health Canada, it was determined the pills actually contained N-Pyrrolidino protonitazene.
They're described as white in colour, circular and have a "10/325" stamp on one side and "RP" on the other side.
Police said N-Pyrrolidino protonitazene is a subclass of the nitazene analogue, and is a schedule one substance contrary to the Controlled Drugs and Substances Act.
The pills are being called a serious threat to community safety, and police are emphasizing the dangers of using drugs that are not prescribed by a physician and/or provided by a registered pharmacist.