Authorities have released the name of a teenager who was killed when a stone slab weighing about 650 pounds fell on him outside a southern New Jersey business that makes countertops.

Ocean County prosecutors say 17-year-old Jared Marchiano was found at about 6:40 a.m. Saturday at Stone N' Counters South LLC in Berkeley Township. The business was closed when the accident occurred, and it's still not clear why the teen was at the site.

It appears that Marchiano was trying to walk between marble and granite slabs when a massive slab fell on top of him. It's not clear how long he had been trapped before a passing motorist spotted him and called police.

The Berkeley resident was pronounced dead shortly after authorities arrived on scene.