A man and woman were arrested as Chester County deputies seized 3.7 pounds of fentanyl, a synthetic opioid, Sheriff Max Dorsey said.

Travaris and Lamonica Dixon face decades in prison, if convicted in connection with a large drug and weapons seizure at their home in Chester.

Two people have been arrested in connection to the largest fentanyl seizure to date in Chester County that had the power to kill more than 800,000 people, according to the Chester County Sheriff’s Office.