Update 1 p.m.
WRAL reports that about 20 workers were injured:
http://www.wral.com/news/local/story/5313797/
Breaking news:
The ConAgra Foods building on Jones Sausage Road has collapsed, with no initial reports of injuries, WRAL reports.
Watch the Sky 5 video here:
http://www.wral.com/news/video/5313604/
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