It was around 2:00 p.m. when the sheriff's department, along with Darby Police and the Drug Enforcement Administration, were serving warrants in Darby Borough.
Authorities were conducting a drug raid at Kreative Cutz barbershop in the 500 block of Main Street.
Witnesses say authorities went in with guns drawn and told everybody to get down on the ground.
Following the drug raid, officials say Deputy Sheriff Vincent D'Agostino, 33, was injured when a police weapon discharged into the floor.
As a result, Deputy D'Agostino was hit in the leg and injured by some type of fragmentation.
He was transported to the Hospital of the University of Pennsylvania where he was treated for non-life-threatening injuries and released.
D'Agostino is a resident of Drexel Hill and has been a Deputy in the Delaware County Sheriff's Office since 2009.
Investigations are underway to determine the specifics of the accidental discharge.
"We are very grateful that Deputy D'Agostino was not seriously injured and will return to duty soon. We also appreciate the assistance of our fellow law enforcement officers from Darby and DEA for their assistance. In addition, our thanks go out to the doctors, nurses and staff at HUP for the treatment rendered to Vince from the time he arrived until his discharge later in the afternoon," Sheriff McGinn said in a statement following D'Agostino's release from the hospital.
The Delaware County District Attorney's Office is investigating the incident.