According to Nydailynews.com:
A plane crashed into a FlightSafety building at Mid-Continent Airport in Wichita, Kansas, the airport confirmed, killing at least four people inside, leaving five hurt and at least five unaccounted for, authorities said.
Witnesses reported the plane down around 10 a.m. Central Time Thursday. The airport described it as a small plane.
100 people were in the flight safety center (pictured above) when an airplane crashed into it
We will keep you updated with this story as it progresses.