LOS ANGELES (CBS) — Several raids occurred in Los Angeles Tuesday morning as part of an investigation into a computer hacking group called “Anonymous,” FBI sources confirmed to CBS 2.

Raids and seizures have also taken place in Northern California, New York, New Jersey, Nevada and Florida, according to law enforcement sources.

So far, at least 14 people have been arrested nationwide.

According to the Associated Press, Anonymous is a loosely organized group of hackers sympathetic to WikiLeaks. It has claimed responsibility for attacks against corporate and government Web sites worldwide.

The group also claims credit for disrupting the Web sites of Visa and MasterCard in December when the credit card companies stopped processing donations to WikiLeaks and its founder, Julian Assange, the AP reported.