He is reported to have sent them in industrial shipping containers. Conditions in the shipping containers are reported to have been extremely crowded, and that many of the captives died in transit. When the captives complained that they were suffocating General Dostum's troops are reported to have fired directly into the shipping containers, killing some of the men, but providing limited ventilation for the others.
^"The Afghan ship-container 'massacre'". BBC News. 2009-07-13. Retrieved 2013-07-07. "US President Barack Obama has said he is looking into the alleged atrocity, amid recent reports that the administration of George W Bush resisted efforts to investigate it fully."