The Fostoria Police Division responded to four suspected drug overdoses in four days.
On its Facebook page this past Monday, the department stated that three of the drug overdoses resulted in fatalities.
All three were adults and police suspect that the fatalities were caused by bad street drugs.
The investigation by Fostoria Police is still ongoing.
The police department stated that if you, or anyone you know is struggling with addiction, call the Crisis Hotline at 1-800-826-1306.
Part of the city of Fostoria is in northeast Hancock County.