A New Zealand man who bought a second-hand MP3 player that contained U.S. military files on personnel who served in Afghanistan and Iraq handed it over to U.S. officials on Wednesday, New Zealand media reported.

Chris Ogle, 29, bought the $10 MP3 at a thrift shop in Oklahoma but when he plugged it in discovered it contained 60 U.S. military files, said New Zealand television program One News which broke the story.

The files contained the names and personal details of American soldiers, including ones who served in Afghanistan and Iraq, as well as information about equipment deployed to bases and a mission briefing, said One News.

Some files contained active mobile telephone numbers and social security numbers of military personnel.

U.S. embassy officials in New Zealand spoke to Ogle on Tuesday night and swapped his old MP3 player for a new one on Wednesday, New Zealand Press Association said.