SACRAMENTO, Calif. -

Federal prosecutors have indicted six members of a motorcycle gang in Northern California on charges related to methamphetamine trafficking, including two who remain fugitives.

The U.S. attorney's office in Sacramento announced the indictments Friday, a day after they were issued. The ongoing investigation by federal and local enforcement agencies targeted three Sacramento-area chapters of the Vagos Outlaw Motorcycle Gang.

The FBI used confidential sources and undercover agents to buy methamphetamine on several occasions from Vagos members and their associates. In addition to distributing methamphetamine, the investigation also found members of the Sacramento-area chapters involved in illegal weapons purchases and handling stolen motorcycles.

Prosecutors say the gang has an estimated 600 members with chapters in Arizona, California, Hawaii, Nevada, Oregon, Utah and Mexico.