CAMBRIDGE, MASS. (WHDH) - Part of Harvard Square was closed off after heavy winds blew a fence off the roof of a building under construction Monday evening, witnesses said.

The wind blew a metal fence off the roof of a building on Brattle Street, knocking it into orange mesh that left it dangling over the street before falling in front of a moving car, a witness said.

“Some of the railings just literally fell off the building,” Tory Joyce said. “A car was driving by and they just missed the car, the car ended up ramming into it.”

Firefighters rushed to the scene at Mass Ave and John F Kennedy Street and quickly roped off the area.

No one was hurt, but police and firefighters blocked off traffic so crews could cut down other fence equipment dangling from the mesh.

The building has since been secured.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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