The SF Gate story begins:

Federal immigration authorities raided more than a dozen locations in San Francisco, Richmond and South San Francisco today, arresting several alleged members of the notorious MS-13 street gang, authorities said.

Authorities said the investigation targeted a San Francisco-based faction of the violent group, also known as Mara Salvatrucha, which started in Southern California with roots in El Salvador.

“This is a major take-down,” said Northern California U.S. Attorney Joe Russoniello, adding that the investigation dealt with alleged drug trafficking, gun running, terrorism and extortion activities of the group. He declined to provide further details about the raids.

Full story here.