HOUSTON — The Wall Street Journal is reporting that investigators are looking at whether or not counterfeit drugs played a role in some deaths at Travis Scott's Astroworld Festival, including the use of possible counterfeit pills laced with fentanyl.
RELATED: HPD, FBI leading criminal investigation into Astroworld Festival | Harris County looking into independent assessment
Eight people died Friday night during the concert at NRG Park.
Houston Fire Chief Sam Peña told CNN that there was evidence that drugs were involved at Scott's concert but he doesn't know exactly what they were.
"We've heard about that. There is evidence that there were drugs involved but I don't know exactly what they were. All that is going to be fleshed out after the investigation," Peña said.
Peña said the Houston Fire Department administered a lot of NARCAN, which is the medication used to counter an opioid overdose.
“Just because we administered lots of NARCAN doesn’t mean that overdoses were prevalent. That is a medication that we administer when someone is unconscious and we don’t know what the genesis of that situation is so we give it to try to rule things out,” Peña said.
It's unclear exactly how many doses of NARCAN were administered to unconscious patients.
RELATED: Astroworld Festival security guard said he was 'pricked' in neck, injected before passing out, Houston police chief says
The Houston Police Department would not confirm any of the reports that drugs may have played a role in some of the deaths or injuries, but on Saturday, Police Chief Troy Finner said a security officer claimed to have been "pricked" in the neck before he lost consciousness. The officer was revived with NARCAN and a possible injection site was noticed on his neck.