UPDATED: October 8, 2014 1:40 p.m.

DALLAS (WNEW/AP) — The first Ebola patient diagnosed in the United States has died, says the Dallas hospital that treated the man.

Wendell Watson of Texas Health Presbyterian Hospital says Thomas Eric Duncan died Wednesday morning.

Duncan arrived in Dallas Sept. 20 from Liberia and fell ill a few days later. On his way to Dallas, he stopped at Dulles International Airport for a few hours during a layover.

The CDC said Duncan wasn’t showing symptoms at that time, but his stop in the D.C. area airport caused concern in the area nonetheless.

Just a few days after news broke that the Dallas hospital was treating Duncan for Ebola, hospitals throughout the country began testing people who showed similar symptoms, including one person at Howard University Hospital and someone at a Maryland hospital.

RELATED: Md. Health Department is Preparing in Case Ebola Spreads

None of those patients had the deadly virus, however, the CDC said hospitals should be cautious of anyone showing symptoms that traveled from West Africa.

The incident also spooked airline investors. Shares of United and other leading U.S. airline companies dropped 2.8 percent or more. Shares of European carriers fell by similar margins.

For more information see the story on CBS Dallas/Fort Worth.

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