Investigators: Construction Workers May Have Caused Glass To Fall From Midtown High-Rise

<p>At least three people were injured after glass fell from a high-rise building in midtown Thursday morning. The Department of Buildings spent the day at the scene, looking into what may have caused the incident. At this point, investigators believe construction workers on the 18th floor may have accidentally hit the window with a piece of heavy machinery. CBS 2's Kathryn Brown reports.</p>