SAN FRANCISCO --Less than two weeks after Attorney General Eric Holder announced plans for sweeping drug sentencing reform to help fix a "broken system," the Drug Enforcement Administration has ordered security and armored vehicle companies to quit serving state-legal cannabis providers, according to industry sources.

The DEA, an arm of Holder's Department of Justice, confirmed the order to The Huffington Post, but wouldn't elaborate.

Armored vehicles allow California's legal medical marijuana dispensaries a secure way to transport large amounts of cash. The services are critical, since federal authorities pressured banks and credit card companies to stop servicing the pot industry in 2011.