Anthrax scare leads to evacuation of two Texas schools

Hundreds of students in two of Texas' Garland district elementary schools had to be evacuated on Tuesday following the discovery of envelopes containing white powder that had been mailed to the schools' offices.

FBI officials have said that the powder contained in the envelopes, which were discovered at Ethridge Elementary in Garland, Texas, and Armstrong Elementary in Sachse, Texas, was not harmful. The officials have also said that they do not believe that the envelopes were part of a prank meant to delay standardized testing currently occurring at the schools.

"I don't believe that's going to be the motive," FBI spokesman Mark White told

As a precaution, an office worker at Ethridge was taken to a hospital after she experienced itching and trouble breathing, officials said.

An alert was issued to the entire school district following the discovery of the Ethridge envelope. The second envelope was found by a police officer stationed at Armstrong. The officer did not open that envelope.

"He saw the specific return address and took it to his office and secured it," Reavis Wortham, a spokesman for the school district, told

A return address was written on both envelopes, which was found to be that of the Children's Medical Center Dallas. Additionally, a piece of paper was contained in each envelope though officials have not revealed if anything was written on it.

An investigation into the letters has been launched by the FBI and the U.S. Postal Inspection Service.