There are also reports that rescuers have found another body, but it is yet to be dragged from under the debris.
The governor of Khouzestan Province in souhern Iran, earlier also said 38 people remain missing.
Rescue workers have also pulled dozens of people alive from the site.
The unfinished Metropol Building, located on Abadan’s busiest street, crumbled last Monday, leaving dozens trapped in the ruins.
Officials are blaming faulty construction practices for the incident.
Iran’s President Ebrahim Raisi has given assurances that whoever is responsible for the tragedy will be held accountable.
Iran observed a day of national mourning for the victims and a projection mapping, displaying a message of condolence to the people of Abadan, was rendered on Tehran’s iconic Azadi Tower on Sunday night.