Massachusetts State Police said they seized 200 grams of heroin during a traffic stop.
State police said a trooper stopped a car for a motor vehicle violation on Interstate 195 in Dartmouth at about 11 a.m. Monday.
Police said a search turned up about 200 grams of heroin on Ralph Dagostino, 46, of East Wareham, who was a passenger in the car. He was charged with drug violations.
A second passenger, Catherine Murphy, 21, Plymouth, was wanted on an outstanding arrest warrant.
Dagostino and Murphy were being held pending their arraignments in New Bedford District Court.
The driver was cited for motor vehicle violations and two other passengers were cited with civil violations.