(ASSOCIATED PRESS) Employees at a maximum security New York prison fell ill Friday after a letter was opened that contained a substance believed to be fentanyl, Gov. Andrew Cuomo said.
Eleven people were taken to a hospital from the Clinton Correctional Facility Annex in Dannemora, New York. All were later released, the governor’s office said.
An investigation by the state police and Department of Corrections and Community Supervision continues.
Advertisement - story continues below
“While testing is ongoing, it is believed that this substance is fentanyl,” Cuomo said in a news release.