Five people, including two Iranian police officers, were killed. Others were trapped under the rubble resulting from the collapse.
Friends and family posted frantic appeals in online chatrooms with names, photos and GPS locations of residents, including children and many elderly people, who were still waiting to be picked up
No foul play was suspected.
Firefighters were continuing to tackle the blaze and 80 people have been evacuated, according to the rescue services.
The cadet was rushed to hospital but was pronounced dead on arrival.