The Yuba County Sheriff's Office said it discovered a 3-D printing firearms operation in Marysville, leading to the arrest of three individuals on firearm-related offenses earlier this month. On Sept. 19, deputies executed a search warrant on Waterfall Drive, where they found a fully operational 3-D printing workshop equipped with manufacturing tools. Officials reported the seizure of eight handguns, several 3-D printed handgun frames, four assault weapons, one rifle, and assorted firearms parts. Authorities arrested 19-year-old Uriel Cruz, 27-year-old Eleazar Cruz, and 38-year-old Fortunato Cruz, all from Marysville. They were booked on several firearm-related offenses.See more coverage of top California stories here | Download our app | Subscribe to our morning newsletter | Find us on YouTube here and subscribe to our channel