Pfizer Tornado

A tornado heavily damaged a large Pfizer pharmaceutical plant in North Carolina on Wednesday, scattering medicine and other debris around the complex.

Pfizer said its large complex in Rocky Mount was damaged by a twister that tore through Nash County.

"We are assessing the situation to determine the impact on production," the company said. "Our thoughts are with our colleagues, our patients, and the community as we rebuild from this weather incident."

A Pfizer employee who spoke to ABC11 said it happened in a span of 60 to 90 seconds and there was no time to think. He said first the lights flickered inside the facility and then he said it sounded "like a bomb went off.

The worker said he and his group immediately ran to a designated safety area.