NTD — Authorities in Stockton, California, arrested nearly 90 people while also seizing dozens of guns in a massive multi-agency gang takedown targeting violent street gangs and a recent increase in firearm-related activities in the area.

Tori Verber Salazar, the district attorney of San Joaquin County, touted the mission, dubbed “Operation Hybrid Havoc,” as the most successful crime operation that has ever been conducted in the county.

The investigation had been going on for the past year and picked up steam in the fall. It has been described as the largest gang bust of its kind in the county’s history. Over its course, agents executed 24 search warrants and 19 arrest warrants.

During a news conference on June 2, Salazar said officials arrested 88 alleged gang members on felony charges and confiscated 58 firearms, including 12 “ghost guns”—unregistered firearms often built using a 3D printer.