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HANOVER, N.J. — Two people were killed after a 5-ton generator fell from a crane at a construction site in northern New Jersey Thursday morning.

Hanover Mayor Ronald Francioli said a strap on a crane lowering the generator at an under-construction firehouse snapped.

Morris County prosecutor’s office Executive Captain Richard Rose said the first man died at the scene and the second died later at a hospital. The mayor said one man suffered a collapsed lung, a broken rib cage and leg injuries.

Occupational Safety and Health Administration spokeswoman Lenore Uddyback-Forston said an inspector was dispatched to the work site to investigate after the fatal accident.

The work site is the future home of the Whippany Fire Company.

A spokesman for county prosecutors said the accident is under investigation.

The Associated Press contributed to this report.