Oops:

The daily newspaper, Aftonbladet, turned the stick over to the Armed Forces on Thursday. The paper’s editorial office obtained the memory stick from an individual who discovered it in a public computer center in Stockholm.

An employee of the Armed Forces has reported that the misplaced USB memory stick belongs to him. The employee contacted his superior on Friday and divulged that he had forgotten the memory stick in a public computer. A preliminary technical investigation confirms that the stick belongs to the employee.

The stick contained both unclassified and classified information such as information regarding IED and mine threats in Afghanistan.