At least five people were killed and 27 injured when parts of an unfinished 10-storey building in Iran's southern city of Abadan collapsed, trapping at least 80 more people under the rubble.
A rescue operation was being carried out, Iranian state TV reported on May 23, with emergency teams being sent in from other cities to help.
The semiofficial Mehr news agency said the building was a residential-commercial property on Amir Kabir Street in the city, which is close to the border with Iraq.
Most of those trapped under the rubble were people who were shopping on the ground floor in one of the finished parts of the building, reports said. The collapse caused nearby buildings to "shake violently," they added.
State TV showed footage of angry Abadan residents shouting slogans against the city authorities.
The ILNA news agency reported that the mayor of Abadan, Hossein Hamidpour, was beaten by the angry mob. The report could not be immediately confirmed.
The head of Khuzestan Province's judiciary has ordered a probe into the accident while the owner and the contractor who built the building have been arrested, state TV said.