A 17-storey building in the heart of Iran’s capital Tehran caught fire and collapsed on Thursday, killing at least 30 firefighters. People laid flowers to commemorate the victims in front of Hassan Abad fire station on January 20. /CFP Photo

Firefighters went inside the burning building to bring people out, but the building suddenly collapsed. /AFP Photo

Firefighters, soldiers and other emergency responders dug through the debris and searched for survivors and victims. /AFP Photo

Iranian emergency personnel mourned lost colleagues and friends as they sat in front of the wreckage of the building. /AFP Photo