MASON CITY, IA-Another tragic event takes place just two days after the Boston Marathon Bombings.
A fertilizer plant in West, Texas exploded Wednesday night.
Hundreds of people were hurt in that explosion, and officials say up to 15 people may have already been killed.
Emergency crews are still searching for survivors and sifting through the debris.
Right now investigators do not know what caused it all.
But the entire event is raising questions about the safety of fertilizer plants.
A local business owner who sells fertilizer, tells us it's not flammable by itself, but there are some kinds that can cause a chemical reaction when mixed with other substances.
And a mixture like that is flammable - it was even used in the Oklahoma City bombing.
"It was a fertilizer product called ammonia nitrate, if blended with petroleum type products can be set off to cause a large chemical reaction and explosion and those products, to my knowledge, are not used in the mid west," said Steve Weiner, who owns a local fertilizer business.
Weiner says there is no need for concern near his facility .
He tells us the type they sell is actually used as a fire retardant.
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