One man was killed and another wounded when part of the building they were working on in the Sancaktepe quarter of Istanbul collapsed, reported Turkish broadcasters Tuesday, dpa reported.
The workers had just finished work on a roof and had moved to a balcony on the first storey when the balcony and part of the roof caved in, reported the broadcaster CNN Turk and internet portal Son Dakika.
Emergency crews pulled one man out of the rubble and took him to a hospital.
Ismail Erdem, mayor of Sancaktepe, said no approval had been granted for the work.