Portland firefighters used naloxone to rescue a 15-month-old girl who appears to have overdosed after possibly putting a piece of opiate-contaminated tin foil in her mouth while in a Safeway parking lot on SE Hawthorne Boulevard on Friday night, officials said Monday.

The child was taken to a hospital shortly before 6 p.m. and survived after a bystander with medical training found her unresponsive and not breathing and started performing CPR, said Rick Graves, a Portland Fire & Rescue spokesperson.

Graves could not confirm what drug was on the tin foil, but said first responders suspected it was fentanyl, a powerful synthetic opioid that is about 50 to 100 times more potent than morphine.

The bystander, whom Graves could not identify, found the child not breathing in the parking garage shortly before 5:30 p.m. and took her upstairs to begin CPR. Firefighters responded several minutes later, believing the child was experiencing “simple respiratory distress leading to potential cardiac arrest” until the bystander told them he had seen the child spitting up what appeared to be aluminum foil.

The bystander retrieved the small, crumpled piece of foil, which had the “classic fentanyl look,” Graves said. The child started breathing again after a Portland Fire & Rescue paramedic treated her with naloxone, an opioid overdose reversal drug.

Fire officials notified the Portland Police Bureau after they went to the underground level of the parking garage to investigate and spotted drug paraphernalia inside the child’s parents’ vehicle, Graves said.

Portland police officers arrived at the scene about 5:45 p.m. and searched the car, where they found drugs, foil, drug paraphernalia, scales and torches, said police spokesperson Mike Benner. The child’s parents, whom Benner did not identify, remained at the scene and are cooperating with the investigation. Neither has been arrested, Benner said.