New York - State and federal officials are investigating what caused a huge construction crane to collapse across the Tappan Zee Bridge north of New York City, an accident that somehow caused no serious injuries but added to a list of crane wrecks in recent years that have prompted initiatives to improve safety.

The state Department of Labor and the federal Occupational Safety and Health Administration are among the agencies probing the accident, which blocked traffic on the vital Hudson River crossing for hours Tuesday and kept a lane closed through the day Wednesday.

Gov. Andrew Cuomo said there was no immediate answer as to why the crane fell.

“I’m pushing very hard to get the agencies to accelerate and expedite the investigation because we want to know what it was,” he said.... Read More: VIN