Officials ID worker killed when stairwell collapsed at Cambridge construction site Share Updated: 10:32 AM EST Mar 5, 2021 Officials ID worker killed when stairwell collapsed at Cambridge construction site Share Updated: 10:32 AM EST Mar 5, 2021 Hide Transcript Show Transcript TODD: IT HAPPENED IN THE MIDST OF A CONSTRUCTION PRODUCT -- PROJECT. THE STAIRWELL WAS BEING RESTORED WHEN THE COLLAPSE HAPPENED. TONIGHT, THE CAUSE IS STILL UNCLEAR. >> UPON ARRIVAL, FIRE COMPANIES DISCOVERED INTERIOR COLLAPSE OF THE STAIRWAY. TODD: MEDICAL EXAMINER’S VANS LEFT THE SCENE THIS MORNING. A 56-YEAR-OLD CONSTRUCTION WORKER IS DEAD AND HIS COWORKER IS INJURED. THE COLLAPSE HAPPENED JUST BEFORE 8:30 THIS MORNING INSIDE A STAIRWELL ON THE SECOND STREET SIDE OF THIS PARKING GARAGE OWNED BY THE CITY OF CAMBRIDGE. THE MEN WERE IN THE STAIRWAY, WORKING ON A RESTORATION PROJECT WHEN THE COLLAPSE HAPPENED, AND HEAVY MATERIALS FELL. >> PRETTY HEAVY, YOU’RE TALKING STEEL RISERS WITH POURED CONCRETE ON TOP. PROBABLY AT LEAST A TON IF NOT MORE. TODD OSHA IS INVESTIGATING THE : CAUSE OF THE COLLAPSE, ALONG WITH THE MIDDLESEX DISTRICT ATTORNEY. WHAT INVESTIGATORS ALREADY KNOW IS THAT THE STAIRWAY WAS BEING DISASSEMBLED. >> THEY WERE REMOVING THE EXISTING STAIRWELL, BECAUSE IT’ GOING TO BE REPLACED. TODD: OFFICIALS HAVE NOT YET RELEASED THE NAME OF THE DECEASED OR THE NAME OF THE SUBCONTRACTOR THAT THE MEN ARE EMPLOYED BY. REPORT