52 people have been killed during a stampede at a funeral procession for a top Iranian general.
Qassem Soleimani was killed in a US airstrike last week.
Iranian state television's reported nearly 190 others have been injured in the south-east of the country.
The burial of Qassem Soleimani has now been postponed.
US President Donald Trump ordered the airstrike, which was carried out on Friday.
The American Department of Defence had said the strike was aimed at deterring future Iranian attack plans.
It's reported Tehran's now considering 13 scenarios to avenge the assassination.