WILLOW GROVE, Pa. (CBS) — Federal authorities conducted raids at Advanced Urgent Care centers across the region on Monday as they are being investigated for illegal synthetic opioid prescriptions and whether they were for sale.

The FBI Pill Mill Opioid Task Force, along with drug enforcement agents and local authorities, raided six Advanced Urgent Care clinics from Philadelphia to Scranton.

Philly Among Cities With Longest Commute Times, Says Survey

Neighbors near the Willow Grove location had suspected something was happening for some time.

“It’s just been a problem for the neighborhood and the cops, you know, every day,” said Rebecca Watson, who works across the street as a cook. “There’d be 30 to 40 people lined up before it even opened, with drug dealing in the parking lot and arrests.”

The Pill Mill Task Force targets illegally prescribed synthetic opioids like oxycodone. CBS3 has confirmed locations where in Philadelphia, Willow Grove, Scranton and State College.

While serving the search warrant at 9432 Roosevelt Blvd., agents took boxes of evidence from the Advanced Urgent Care to a police vehicle. Similar confiscations were made in Willow Grove.

1 Dead, Another Critical After Double Shooting In North Philadelphia

“I got kids growing up in the neighborhood, and I don’t want them around the drugs,” Watson said, applauding the drug bust.

Federal authorities have only confirmed limited details about the investigation, it is still unclear how many arrests were made as part of the raids.