ALBANY, N.Y. (AP-modified) — Police in upstate New York are warning of dangerous street drugs after marijuana laced with fentanyl was confiscated in a parking lot and three people were found unconscious in a car in a separate incident.

The Sullivan County Sheriff's Office says marijuana confiscated in a Walmart parking lot in the town of Thompson Monday tested positive for fentanyl, which has played a role in numerous overdose deaths. The sheriff's office says it was the first time the powerful opiate was found in marijuana in the area.

In a separate incident Thursday in Albany County, Sheriff Craig Apple says first responders revived three people who had overdosed in a car in the middle of a road. Another driver came upon the car in the town of Knox and called 911.