Two brothers who allegedly led a cocaine and crack cocaine distribution ring in central Illinois were among 15 people named in federal criminal complaints.

Agents from several law enforcement agencies, including the FBI and Illinois State Police, moved across Bloomington-Normal early Wednesday and arrested suspects, including 30-year-old Matthew and 29-year-old Marcus Sullivan, both of Bloomington. Ten others were also arrested, while three remain at large.

The brothers, and 32-year-old Wyatt Curtis, were among six people charged with conspiracy to distribute at least 280 grams of crack cocaine from 2001 to the present.

The affidavit filed in support of the complaints alleges the Sullivan brothers are the primary leaders of a drug trafficking organization that is involved in cocaine distribution in the Bloomington-Normal area.