Details were still emerging of the incident at a construction site in northeastern Tel Aviv. Police reported six wounded and taken to hospital, with medics saying five were injured lightly and one seriously.
Israeli television reported 15 people missing, but police had not confirmed the number.
United Hatzalah medical service said "firefighters and rescue teams are working to extricate" those believed missing.
"It appeared to me that the roof of a parking garage had collapsed in the building site," United Hatzalah quoted one of its medics as saying.
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