Several climbers are also missing, and local media report that there may be as many as twelve people missing.
The figure is based, among other things, on the fact that worried relatives who are missing their family members have contacted the authorities.
The climbers were in the Elburz mountain range north of the capital Tehran when the storm hit.
Rescue patrols have searched for survivors during the day, but the search was interrupted at dusk and will resume on Sunday.
It is not clear from the report where the climbers come from.