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. Last Updated: 07/27/2016

U.S. Hacking Probe

WASHINGTON -- Russian authorities have withheld full cooperation in a probe of computer heists from defense-related networks in the United States, John Nagengast, a top U.S. National Security Agency official, said Wednesday.

U.S. government computer experts have traced a series of intrusions dubbed "Moonlight Maze" to Internet service providers linked to the Russian Academy of Sciences.

Nagengast said a U.S. official had gone to Russia to pursue the case but had come back without having been able to obtain all the records he would have liked to help trace the culprits.

Nagengast said it was premature to conclude that the cyber blitz was carried out by anyone in Russia.