FAIRFIELD — Six people were arrested Friday when investigators executed a search warrant at a Fairfield residence where they suspected drug trafficking, according to the Somerset County Sheriff’s Office.

Around 5:45 a.m. Friday, Somerset County sheriff’s deputies and detectives, with the help of Fairfield and Waterville police, executed the search warrant at the residence on Gagnon Road, Somerset County Sheriff Dale Lancaster said in a statement issued Monday.

During the search, the investigators found and seized approximately 53 grams of suspected fentanyl, a small amount of suspected methamphetamine, pills, digital scales, drug packaging materials, other drug-related items and $7,725 in suspected drug sale proceeds, Lancaster said.

The U.S. Drug Enforcement Administration says 2 milligrams of fentanyl, a synthetic opioid, can be lethal, so 53 grams would be roughly equivalent to about 26,500 lethal doses of the drug.

The Sheriff’s Office arrested three people who were at the home, charging each with one Class A count of aggravated trafficking in scheduled drugs: Adam Knight, 53, of Fairfield; Tina Boutin, 44, of Fairfield; and Dwayne Holmes, 58, of Waterville.

Class A crimes, like aggravated trafficking in scheduled drugs, are punishable by up to 30 years in prison and a $50,000 fine.

Knight and Boutin were being held as of noon Monday at the Somerset County Jail in Madison, with cash bail set at $50,000 each, according to Lancaster and online jail records. Holmes, who was also arrested on a warrant for failure to appear in court in Kennebec County, had cash bail set at $5,000 as of Monday.

Each of the three was ordered to return to court in Skowhegan on July 9, Lancaster said.

The Sheriff’s Office arrested three other people who were at the home when investigators executed the search warrant, Lancaster said, on warrants for failure to appear in court in other counties.

The three were identified as Crystal Cougle, 32, of St. Albans; Thomas Brooks, 36, of Skowhegan; and Melissa Witham, 37, of Rome.