http://www.wfaa.com/sharedcontent/dws/wfaa/localnews/news8/stories/wfaa081021_wz_bankspowder.1361447ba.htmlDALLAS — There were more questions than answers Tuesday evening after powder-laced letters showed up in buildings across the nation.
At least 30 letters were reported in seven cities, including Dallas and Irving. A credible source told News 8 the letters originated in Amarillo.
The FBI and Dallas police are trying to investigate if the mailings are more than just a coincidence.
Dallas Fire-Rescue got the first call about 10:15 a.m. Tuesday from the offices of the Federal Deposit Insurance Corporation on Bryan Street downtown. A worker there opened up a envelope addressed to the FDIC and came in contact with a white powder inside.
A hazardous materials team isolated the powder and the worker, but the substance turned out to be calcium carbonate, a mineral found naturally in chalk, limestone and marble, and an ingredient in antacid products.
One source told News 8 the powder came with a threatening letter that read: "Whoever opened this will be dead within ten days."
The powder and envelope were turned over to Dallas police