June 1, 2008 Crane accident at MGM in Vegas Play video

(NECN) - Investigators looking into last week's construction crane collapse in New York City are now focusing on a possible defect in structure.

Meantime, two more crane accidents occurred around the country on Saturday.

A Las Vegas worker was crushed to death by a crane at the construction site of the MGM Mirage's city center casino resort.

And three people were injured in a crane collapse at a Wyoming coal mine.