About 99 percent of the missing to 650,000 bitcoin at Mt. Gox is lost by internal manipulation of the system. That claims a Japanese newspaper on the basis of a source who is involved in the investigation of the police.
The Japanese police would have ascertained that only 7000 bitcoin is gone with hacks from the outside, claims the newspaper in an article which Coindesk writes. The rest would be gone by internal manipulation of systems. Exactly how that would have happened, reports the article.
If the information is correct, it would be Mt. Gox lied. The service said that the disappearance of the bitcoins was due to an old bug. Previously claimed hackers had access to internal systems of Mt. Gox that there is internal fraud was committed, and researchers found the claim of Mt. Gox also debatable.
Mt. Gox was once the largest bitcoinbeurs in the world, but it was last February, offline and went in april bankrupt after the disappearance of the bitcoins became known.