The two cranes were hoisting a section of the Juliana Bridge in the town of Alphen aan den Rijn. The video, captured by witness Dick van Smirren, shows the cranes drop the portion of the bridge before they come tumbling down after it onto a row of buildings, sending massive waves into the river.
Spokesman for the local fire brigade, Ton Koot, told the Associated Press that only one person has been taken to the hospital so far, but rescue workers are searching the scene to find if there were more trapped in the wreckage.