May 16, 2013 4:56 pm

Criminal activity not ruled out in Texas plant explosion: sources

A file photo of search and rescue workers combing through what remained of a 50-unit apartment building the day after an explosion at the West Fertilizer Company destroyed the building April 18, 2013 in West, Texas.

Chip Somodevilla/Getty Images

WEST, Texas – Investigators have not ruled out criminal activity as the cause of a massive explosion at a fertilizer plant that killed at least 14 people and flattened part of a tiny Texas town, two officials familiar with the findings said Thursday.

The April 17 blast at West Fertilizer injured 200 and levelled part of the tiny town of West. Officials have spent one month combing through debris and speaking to hundreds of witnesses.

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But they have not yet been able to pinpoint the cause, the officials said.

For our full coverage of the West, Texas explosion, click here

One state official who’s seen a report on the probe told The Associated Press investigators are focused on a golf cart on the premises that had been recalled by its manufacturer, an electrical problem or possible criminal activity. A second law enforcement official briefed on the findings confirmed no definitive cause has been found.

The state official said investigators were “light on definitive information” into the cause of the blast. The official declined to give more details until after authorities held a news conference to announce their findings.

Both officials spoke on condition of anonymity because briefings were ongoing and they did not want to speak publicly before a scheduled news conference by state and federal authorities.

Officials have determined that ammonium nitrate exploded, but they do not know what started the initial fire or caused the explosion.

Authorities have arrested a paramedic who helped evacuate people ahead of the explosion and charged him with possessing bomb-making materials. But officials have not announced any link between the man, Bryce Reed, and the explosion.

The dead included 10 first responders and two volunteers trying to fight the initial fire, which was reported 18 minutes before the blast. The explosion registered as a small earthquake, sent debris flying more than a mile away, and left 93-foot wide (28-meter wide) crater at the site of a fertilizer storage building on site.

That left investigators from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives and the Texas State Fire Marshal’s Office with an investigation some compared to an archaeological dig. The agencies brought in dozens of agents to sift through remnants of the site, stacking any piece of debris that might be useful on blue tarps and hauling away the rest.

Two months before the explosion, the plant reported it had the capacity to store as much as 270 tons of ammonium nitrate, though how much was actually on site when the blast occurred is unknown.

Ammonium nitrate is a chemical used as a fertilizer that can also be used as a cheap alternative to dynamite. It was the chemical used in the 1995 Oklahoma City bombing.

The fire marshal’s office had previously ruled out several possible causes for the initial fire, including another fertilizer stored on site, anhydrous ammonia; a rail car on the site that was carrying ammonium nitrate; and a fire within a storage bin of ammonium nitrate.

Daniel Keeney, a spokesman for Adair Grain Co., which owned and operated West Fertilizer, has said the company is co-operating with authorities, but declined to comment further.

Vertuno reported from Austin.

© The Associated Press, 2013

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