NAPLES, Italy — A Navy contractor has been arrested and charged with intentionally damaging a Naval Forces Europe/6th Fleet computer system designed to track and plot the locations of ships and submarines.

Richard F. Sylvestre, 43, of Boylston, Mass., was arrested by U.S. marshals and arraigned Monday in a U.S. District Court in Norfolk, Va.

He was released on $10,000 bail and, if convicted, faces up to 10 years in prison and up to a $250,000 fine.

Navy officials referred all questions to the Department of Justice, which issued a news release about Sylvestre’s arrest.

Sylvestre worked as one of several systems administrators at the Naples, Italy-based European Planning and Operations Center. He is charged with installing malicious codes into software on the computer system on or about May 19, according to the release.

Two days later, the software caused two computers to crash when it deleted critical operating files. A check of the center’s other computers showed that several additional computers, including a network server, also were programmed with similar malicious codes.

The discovery was made before the date and time that the software was set to execute and damage the systems, according to the release.

No injuries or incidents resulted from Sylvestre’s actions.

The Virginian-Pilot reported that Sylvestre confessed to Naval Criminal Investigative Service agents that he installed the software, saying that he was upset that his company’s bid on a project wasn’t accepted.

The Naval Criminal Investigative Service is investigating the case.

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