Eight months after the acting director of US Immigration and Customs Enforcement said at a border security conference that the Trump administration aims to carry out its mass deportation operation with the same efficiency as Amazon’s package deliveries, a draft document from ICE officials on Wednesday provided never-before-seen details of how the agency plans to do that using massive warehouses repurposed to hold tens of thousands of people.

The Washington Post reported on a draft solicitation document, a version of which ICE plans to send to private detention companies this week.