Transcript for NYC Crane Cable Snaps, Air Condition Unit Plunges Nearly 30 Stories
We turn to a frightening scene on the streets of New York City after a crane cable snapped sending a massive air-conditioning unit plugging nearly 30 stories, seven people were injured and ABC's Tom llamas is at the scene of the accident for us. Good morning, Tom. Reporter: Robin, good morning to you. Eyewitnesses say it sounded like an explosion and that piece of equipment the size of a shipping container. Look where it fell from, 300 feet from high above. You can see where it started to fall as it made its path falling from the sky and hitting the street. This morning, city offs vowing to figure out what caused a crane cable to snap over midtown Manhattan dropping a massive four-ton air-conditioning unit. The unit smashing into a building as it tumbled 30 stories to the city street. I looked out the window and I saw a plume of smoke. The street was not visible because there was so much smoke like a bomb hit Madison avenue. Reporter: Meal low was watching TV in his apartment across the street when the accident happened. He shot this cell phone video. Cars are destroyed. I hope nobody is hurt. Reporter: The crane mishap left a gaping hole in one building. Office chairs falling out and ending up on the sidewalk. Cars along the street were hit with chunks of debris. Heard an initial crash and rapid almost like firecrackers going off. Reporter: Two construction workers and eight others suffered nonlife-threatening somewheres. New York City has a history of deadly crane accidents. In April a man inspecting part of a crane died when a mechanical failure caused the boom crane to collapse on him. And in 2008 a crane came crashing down flattening a town house and killing seven people. This morning, residents feeling shaken up as crews work to clear the destruction. And just behind me you can see and hear some of the cleanup and the investigation which will not be helped by this bad weather. Robin. All right there. Thank you, Tom.
This transcript has been automatically generated and may not be 100% accurate.