The Department of Homeland Security agents has intercepted more than US$6m worth of fake garments and shoes bearing labels such as Nike, Sean Jean and Lacoste, Associated Press reported.

Citing a federal complaint filed by US Attorney Michael J Garcia, the report said four people were arrested in connection with the foreign-made counterfeits.

The apparel industry "is increasingly threatened by counterfeiters who sell fake trademarked goods to sometimes unwitting customers," Garcia said in a statement.

Other pirated trademarks included Route 66, Baby Phat, Pepe and Rocawear.

Some jeans that would have cost about $300 had they been original were retailing for as little as $60.