TEHRAN, Iran -- Search teams on Wednesday found five more bodies of victims from last week's deadly collapse of a burning building in Tehran, state TV reported.

Jalal Maleki, spokesman for the fire department, said all the bodies belong to firefighters killed in the disaster.

At least 20 firefighters were reportedly killed in last week's collapse. On Monday, search teams found four bodies that were not firefighters.

Authorities have yet to offer definitive casualty figures. So far, only 11 bodies have been retrieved. One injured firefighter also died in the hospital a day after Thursday's collapse.

The fire and subsequent collapse was the worst such disaster in Tehran since 2005, when a blaze at a historic mosque killed 59.