SPRINGFIELD (AP) - Authorities have arrested 11 western Massachusetts men on federal indictments accusing them of distributing illegal drugs after a drug task force investigation of heroin and cocaine trafficking in Holyoke.

The U.S. Attorney's office in Boston said Friday two of the men also face illegal firearms charges. Eight people are facing state drug charges.

Ten of the men arrested are from Holyoke, and one is from Springfield.

An FBI affidavit filed in the case alleges one of those charged, 34-year-old Francisco Diaz, was a local leader of the La Familia street gang who headed a drug distribution operation in South Holyoke. He is in custody and not available for comment. It's not immediately known who is representing him.

The joint state and federal investigation focused on activities of the La Familia and rival Latin Kings gangs.