SANFORD, Maine — Five local residents were arrested Monday in connection with a heroin trafficking operation.

The arrests come after an investigation by the Maine Drug Enforcement Agency, according to a release from Maine Department of Public Safety spokesman Steve McCausland.

Arrested were Derek A. Gerrish, 25, and Cynthia Powers, 49, each on warrants charging two counts unlawful trafficking of Schedule W drugs; Donald Nordmann, 48, on a warrant for one count of unlawful trafficking in Schedule W drugs; Erika Gerrish, 26, on a charge of unlawful possession of Schedule W drugs; and Michael Gerrish, 46, on a charge of unlawful possession of Schedule W drugs.

McCausland said the arrests resulted from a two-month investigation of heroin trafficking in the Sanford area, and that MDEA agents had made controlled heroin purchases from Derek Gerrish, Cynthia Powers and Donald Nordmann at 7 North St., where all five suspects live.

At about 5 p.m. Monday, MDEA agents and Sanford police searched the North Street home with warrants for the arrest of Derek Gerrish, Powers and Nordmann. Erika Gerrish and Michael Gerrish were also arrested after both were found to be in possession of heroin, McCausland said. Michael Gerrish is the uncle of Erika and Derek Gerrish, who are siblings.

Police found scales, packing materials, drug ledgers and approximately 19 grams of heroin, valued at about $4,000, the release said.

The five were brought to the York County Jail, according to the release. Derek Gerrish, Powers and Nordmann each had bail set at $20,000 cash. Bail for Michael and Erika Gerrish was set for $5,000 cash.

The MDEA is still investigating the case and more charges are expected, McCausland said.