PORTLAND — Agents with the Maine Drug Enforcement Agency arrested another New York man last man, and charged him with selling heroin in Maine, this time in Portland. This is the fourth time in a week that a New Yorker has been charged with selling heroin in the state.

Jomo K. Cunningham, 22, of Brooklyn, was arrested Dec. 10. According to the MDEA, agents from the Cumberland County District Task Force and officers from the Portland Police Department Crime Reduction Unit searched Cunningham’s room at the Clarion Hotel on Congress Street in Portland around 6 p.m.

In a press release, the MDEA said that for the past two months, agents had been conducting an investigation into the distribution of heroin by Cunningham and others from New York City, in the Greater Portland area. During the investigation, agents allegedly made a number of undercover purchases of heroin from Cunningham, who they said routinely stayed at local hotels distributing heroin that he and others brought to Maine.

During the search and Cunningham’s arrest, MDEA agents seized about 60 grams of heroin, which is the equivalent to about 600 doses. Also seized were digital scales, packaging materials and some cash from suspected drug sales. The street value of the heroin was $8,400.

Cunningham was transported to the Cumberland County Jail in Portland, where bail was set at $25,000. The investigation is ongoing and additional arrests are expected.

Earlier this week, two New York men were arrested in their car on the Maine Turnpike in Kennebunk, and another New Yorker was arrested inside his Gardiner apartment, all charged with selling heroin.