The activity was tied to a drug trafficking organization, according to the FBI. Multiple people were arrested across Chicago and the suburbs Thursday morning as part of an investigation into a drug trafficking organization, federal officials said. What we know:The FBI Chicago said agents began court-authorized activity at around 6 a.m. alongside the Chicago Police Department and other partners. The operation was connected to the takedown of a drug trafficking organization, according to the FBI. What they're saying:"The FBI is dedicated to working with our local, state and federal law enforcement partners to keep our communities safe," the FBI Chicago said in a post on social media.