UPDATE 4:30 p.m.:
Carlton Williams, commissioner of the Philadelphia Department of Licenses and Inspections, has said the accident around 11 a.m. on 15th Street was caused by falling plywood that was being delivered through a window to the building above.
A truck and a passenger car were partially crushed by the falling plywood. No injuries were reported.
Williams released the following details, based on an L&I inspector's report:
-Teague Lumber delivery truck was attempting to deliver a load of plywood using a “boom” (crane) truck through an upper window of the building.
-The load became dislodged and fell to the ground.
-According to the police officers on site, no injuries reported.
-The vehicle was towed away and the fluid spill from the vehicle was cleaned up.
-Clemens Construction was the contractor on site had all required building permits.
Mobile cranes like the one used on site are not under the jurisdiction of L&I, and are supervised by the Federal Department of Transportation.
A dropped object smashed two cars this morning on 15th Street around 11:30 a.m. just across from City Hall.
A witness who was walking to work when the incident occurred said they estimated that the falling object was dropped 60 feet and that the sound was like "an explosion."
The witness, who asked not to be named, said they could not clearly see the falling object, but that it smashed the hood of a Volkswagen Jetta that was driving down the street.
The driver of the Jetta then reportedly immediately stood up out of their car, and appeared to be uninjured, a witness said.
Before 2 p.m., the cab of a construction truck was still on scene severely damaged and with the windshield crushed (see above).
A city inspector was on scene interviewing a contractor.
The construction site has been active for weeks and has been seen lifting mass packs of sheet-rock.
Comment from L&I Commissioner Carlton Williams was not immediately available.