The team backtracked from its original stand at a June 29 "briefing" attended by three media organizations including the Journalist Association.

It clarified that a very small amount of crystalline aluminum oxides were detected, too, quite contrary to its May 20 announcement of the "investigation results" that only non-crystalline aluminum oxides were found during underwater explosion test.

It let loose a string of poor excuses, saying that "a very small amount of crystalline aluminum oxides was confirmed to be present when closely looked into the previous analysis to check if crystalline aluminum oxides were present or not."