KARACHI: Sarfaraz, a 42-year-old laborer who only gave his first name, stood outside a smoke-darkened Gul Plaza as he desperately scanned his surroundings for his 13-year-old son, Hamza, who worked at a shop inside the multi-story commercial building in the southern Pakistani city of Karachi. He has visited the site multiple times since a fire broke out there last week, but authorities did not let the 42-year-old enter the premises out of safety concerns, forcing him to return home where his wife continues to question him about their son.