Three people are dead and five others have overdosed after what Sarnia Police say was either a potent or “bad batch” of fentanyl.

Police Service responded to eight overdoses since Friday, with the last overdose occurring earlier this morning .

Three of the eight individuals were found deceased. .

It is also believed, police say, but not confirmed, that the fentanyl being used is either very potent or a “bad batch”.

“We would like to warn the public of this serious health concern,” says Const. John Sottosanti in a news release.

“We realize that individuals will continue to use opioids, in various forms, but we are asking those individuals to please keep the following in mind:

1. Have someone with you when you are using this substance that can administer Naloxone when required.
2. Ensure you have Naloxone available and are trained in its use.
3. Please call 911 immediately if someone has overdosed due to the fact that they may require further medical attention.”