A New Hampshire man has been sentenced in Maine to four years in prison on heroin charges.

Federal prosecutors say 30-year-old Derek Parker of Gonic, N.H., pleaded guilty in November 2013 to conspiracy to distribute heroin.

He was sentenced Thursday to a prison term, followed by three years of probation.

Court records say Parker was obtaining 10 to 20 grams of heroin nearly every day and distributing the drug to customers in Maine and southern New Hampshire.

Parker and 13 other people were indicted on conspiracy charges last April.

Authorities say the arrests were made after a joint investigation by Maine and New Hampshire law enforcement and federal officials.