At least 24 people overdosed on heroin in Akron, Ohio Friday night, CNN reports.
Police found drugs laced with the painkiller fentanyl and carfentanil, a version of fentanyl that is used as an elephant tranquilizer.
This comes after police shared disturbing photos of a couple overdosing with a child in the back seat of their car.
In August, 62 people overdosed in Cincinnati over two days.
Fentanyl has also drawn attention after examiners determined that it killed Prince. Mislabeled pill bottles were found in his home with fentanyl inside.
The United States is in the midst of a fentanyl crisis.
Dealers have been cutting heroin with fentanyl to stretch their supply of the drug, according to a Drug Enforcement Agency fact sheet.
Ohio's Department of Health found that 40 percent of overdose deaths in the state were tied to fentanyl.
Some Twitter users were not sympathetic.