US officials say that the US had already warned Iran about the threat of terrorism on the anniversary of General Qassem Soleimani.
The US official said that the US had informed Iran through private sources of the threat of terrorism, the US government had carried out a long-standing policy of warning.
The US official said that it is US policy to warn governments of potentially deadly threats, partial warnings are issued to save innocent lives in terrorist attacks.
It should be noted that more than 100 people were killed in two explosions in the city of Kerman in Iran last month.
On the occasion of the fourth anniversary of the Iranian commander General Qassem Soleimani, two bags filled with explosives were placed at the entrance of the cemetery near his tomb.
Iranian media said that after the first explosion, people were also injured during the stampede of the crowd, after the explosions, security was on high alert throughout the city.