A second worker who was killed Friday when an oil and gas well exploded in Indiana Township was identified today.

Andy Yosurack Jr., 56, of Creekside, Indiana County, died Friday while doing maintenance on an oil storage tank at 9:50 a.m., according to the Allegheny County Medical Examiner's office.

He and another working, Kevin Henry, 46, of New Florence, both suffered significant burns and were pronounced dead at the scene at 10:16 a.m.

The two had been working at the site with a third man, who was not injured. Police have not released his name, but he has provided information for the investigation.

It took until today for authorities to name Mr. Yosurack because he was badly burned and dental records had to be used to positively identify him.

Autopsies conducted Saturday on both men were inconclusive, and a cause-of-death determination is pending the results of toxicology and other tests, the medical examiner said.

Something caused an explosion at the two-year-old well that ripped open a 12-foot-by-8-foot oil storage tank, which was flung about 70 yards from the blast site off of Rich Hill Road.

Investigators, including the county fire marshal and police detectives, township police, the federal Occupational Safety and Health Administration, and the bureau of Alcohol, Tobacco, Firearms and Explosives, have not determined the cause of the blast.

The well is one of a handful in the township owned by Huntley & Huntley Inc., a drilling company based in Monroeville.

Huntley said in a press release over the weekend that it is conducting its own investigation while cooperating with federal, state and local investigators.

No other injuries were reported at the site, although three of the estimated 200 first responders were treated for smoke- and heat-related issues.

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