A three-month, undercover investigation into the distribution of illegal narcotic substances led to the arrests of four men in New Milford this week.

Police also said they confiscated some 200 bags of heroin that undercover detectives were able to buy.

Two New Milford men -- Christopher Florio, 35, of West Street, and Scott Buckingham, 41, of Geiger Road -- were charged in warrants with multiple counts of selling narcotics, including one count each for selling narcotics within 1,500 feet of a day-care facility.

Mr. Florio was arrested on two counts of illegal sale of narcotics, as well as one count of conspiracy to sell narcotics and one count of conspiracy to sell narcotics within 1,500 feet of a day-care facility.

Mr. Buckingham was charged with three counts of illegal sale of narcotics.

A third New Milford man -- David Nieman, 21, of Spring Street -- was charged with threatening, interfering with police and breach of peace.

A Bethel man, Matt Labozzetta, 30, of Wolfpit Road, was charged with conspiracy to commit sale of narcotics and conspiracy to commit sale of narcotics within 1,500 feet of a day-care facility.

The investigation was conducted by New Milford police detectives and the statewide narcotics task force.

Police detectives and task force members made the arrests in the parking lot of the Stop & Shop grocery store along Route 7 earlier this week.

No details about locations were released, but police did say more arrests are expected.

Court documents say the offenses for which the men are charged occurred in late February.

Mr. Florio and Mr. Nieman are scheduled to appear Monday, April 18 at state Superior Court in Bantam and Mr. Labozzetta is scheduled to appear Tuesday, April 19 in the same court.

Mr. Labozzetta has other pending drug charges in Danbury that date back to May 2010. He has a May 9 appearance scheduled at state Superior Court in Danbury.

Mr. Buckingham is scheduled to appear April 29 at state Superior Court in Bantam.