There has apparently been a chemical explosion at the headquarters of Fox News (which is inside the headquarters of it's parent company, News Corp) in New York City. One man has been confirmed to be injured from chemical burns, and 700 people were evacuated. Fortunately, no other injuries have been reported.
So far, this has surprisingly not had an effect on Fox News broadcasting, and the channel is still up and running (probably from it's D.C. studios).
UPDATE: Apparently, it wasn't a major explosion, but was enough to evacuate floors 42 through 45 of News Corp's headquarters. Still, a scary situation, I'm sure.