On Twitter, Rohani's supporters claim the individual who organized the attack on the Saudi embassy is close to Tehran Mayor Qalibaf.
Rohani says some media in the country are trying to create divisions between the government and the people. He says people should be trusted.
We touched on the vetting process in a video explainer ahead of the May 19 vote.
Qalibaf attacks Jahangiri, accuses him of being a cover candidate for Rohani.