A federal indictment released Friday charges Thomas Lee Young, 58, with 16 counts of destruction of energy facilities between November 2000 and December 2002, and two counts of mailing threatening communications.

Young was arrested Thursday by the FBI and was being held until a detention hearing Tuesday, officials said.

Young is accused of sabotaging Southwest Gas Corp. facilities in Pima and Pinal counties in southern Arizona. The company said there were 30 acts in all -- including puncturing of plastic lines with screws or drills and the manipulation of valves to under- or over-pressurize parts of the system.

Three customer outages were recorded by Southwest Gas, but there were no fires, explosions, ruptures or injuries. The company estimated the sabotage cost it more than $500,000.

According to the FBI's affidavit, letters sent to Southwest Gas and state regulators and left in some of the sabotage locations demanded two months' wages and reinstatement of retirement benefits for all employees fired since 1994.

An affidavit filed by the FBI in federal court in 2004 indicated Young was fired after being arrested on a DUI charge in a company vehicle.

The affidavit said he lost 60 percent of his retirement benefits.

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