BOSTON — Thirteen people were arrested and 12 were arraigned yesterday in connection with a major heroin/fentanyl and oxycodone trafficking operation on Boston’s North Shore dismantled as part of a large-scale joint takedown by federal, state and local law enforcement, Attorney General Maura Healey announced today. Authorities seized nearly 2.5 kilograms of heroin/fentanyl, 1,900 pills and $415,000 in cash during yesterday’s takedown, and an additional 95 grams of fentanyl and 1,100 pills during the course of the investigation.

These charges are the result of an extensive investigation involving AG Healey’s Enterprise, Major and Cyber Crime Division, Massachusetts State Police assigned to the Commonwealth Interstate Narcotics Reduction Enforcement Team (CINRET) and the AG’s Office, the U.S. Drug Enforcement Administration (DEA), and the Lynn, Beverly, Danvers and Peabody Police Departments.

“Heroin, fentanyl and oxycodone continue to cause hundreds of deadly overdoses across our state each year,” AG Healey said. “My office is committed to working with our partners in law enforcement to disrupt the trafficking networks that distribute these drugs onto our streets and into our communities.”

“Operations such as this one significantly degrade capabilities of local narcotics trafficking organizations,” said Colonel Kerry A. Gilpin, Superintendent of the Massachusetts State Police. “I especially recognize the work of our State Police detective units, including those attached to our new Homeland Security Division, for working with local police to do the hard work and heavy lifting of building a solid case.”

“The DEA in New England is committed to investigating and bringing to justice those who illicitly distribute oxycodone,” said DEA Special Agent in Charge Brian D. Boyle. “Opiate abuse is a major problem in Massachusetts and throughout New England. The diversion of prescription pain killers, in this case oxycodone, contributes to the widespread abuse of opiates, is the gateway to fentanyl and heroin addiction, and is devastating our communities. DEA and our law enforcement partners are dedicated to stopping this abuse. This investigation demonstrates the strength of collaborative law enforcement efforts in Massachusetts and our strong partnership with Attorney General Healey’s Office.”

“The Lynn Police Department will continue to work with other agencies to bring an end to the opioid epidemic,” said Lynn Police Lt. Michael Kmiec.

“I would like to praise the members of the Beverly Police Drug Control Unit and all of the agencies involved in this collaborative investigation. It shows a dedication and determination to combat the opiate epidemic throughout the Commonwealth and especially on the North Shore,” Beverly Police Chief John LeLacheur said.

“I appreciate the hard work of all of our partners in law enforcement and in particular, the ongoing efforts of Danvers Detective Tim Williamson,” said Danvers Police Chief Patrick Ambrose. “All agencies involved continue to work together to eliminate illegal drug distribution in Danvers and the related addiction problems these sales create. These dealers negatively impact the quality of life in Danvers and surrounding communities, we are committed to disrupting their operations.”

“We appreciate the team effort of the Massachusetts State Police and our local law enforcement partners working together to slow the flow of opiates in the North Shore area,” said Peabody Police Lt. William J. Cook. “These combined efforts will assist us in dealing with our current crisis in opiate related overdoses. Our shared resources and information assists us in combating this problem.”