Hillary Clinton's most trusted State Department aide Huma Abedin once left classified papers in the pocket behind the front seat of a staff car she was assigned in India, according to an email released Monday.

Abedin wrote to Clinton's personal assistant Lauren Jiloty on July 20, 2009 to ask her to move the material to her trunk so an ambassador wouldn't see them when he rode with her in the back seat.

She told Jiloty that the papers consisted of 'burn stuff,' indicating that they were classified documents that belonged among materials that agency rules required employees to place in 'burn bags' for incineration.

'BURN STUFF': Hillary Clinton confidante Huma Abedin asked for help moving classified material from a pocket in front of her staff-car back seat into the trunk for safekeeping

TOP DOG: Clinton and Abedin have been inseparable since her time as first lady in the 1990s

CLEAN-UP CREW: Lauren Jiloty, Clinton's personal assistant, was tasked to move the classified material to a less obvious location

The Daily Caller was first to report on the bombshell revelation, part of 725 pages of Abedin emails released by Judicial Watch.

The conservative open-government group obtained them as part of a Freedom Of Information Act lawsuit against the State Department.

'I'm going to have ambassador ride on next drive,' Abedin wrote to Jiloty in an email titled 'Favor.'

'There's a bunch of burn stuff in the pocket of my front seat.'

'Can u put in trunk?' she asked.

Jiloty responded that she would take care of it.

CARELESS: Abedin accompanied Clinton to a taping of 'Jimmy Kimmel Live' on Monday in California

CAMPAIGN: Abedin is now chief of staff at Clinton's presidential campaign

It's unclear how highly classified the material was. Three of the emails Clinton provided to the State Department from the private email server she used exclusively while she was secretary of state were classified at the 'Top Secret' level or above.

Unless Abedin planned to violate State Department rules regarding burn bags, the papers she referred to were unquestionably classified materials.

The State Department's Foreign Affairs Manual directs that '[b]urn bags must contain only the classified material that is to be destroyed.'

'Personal documents, trash, recyclable materials, metal objects (such as binder clips and acco fasteners), string, twine, spiral bindings, cleaning cloths, food, or any other object that is not classified material should not be placed in a burn bag.'

In a separate email, Abedin asked Jiloty how long it would take to drive to the 'Santushi' shopping district, a location in New Delhi.

The State Department website indicates that Clinton was in India when Abedin sent her emails.

Abedin has spoken in the past of using burn bags at the State Department.

Records released last week indicate that she never received the legally required ethics training that went with her sensitive position at State.