A 44-year-old man was holed up in a crane in the entrance to Jerusalem, threatening to kill himself, Israel Radio reported Wednesday morning.
The man, apparently an artist, said he was protesting the ugly appearance of the bridge being built at the entrance to the city.
Police were at the scene trying to persuade the man to climb down from the crane.
The bridge, designed by renowned architect Santiago Calatrava, is meant to be used by the Jerusalem light rail, slated to start running in 2008.
While the bridge has been the cause of much controversy, Wednesday's suicide threat was undoubtedly the strongest response the project has yet seen.