Iranian Foreign Minister Mohammad Javad Zarif said Tuesday he hoped the US Congress would not be swayed by "warmongers’ propaganda" over the nuclear deal struck between Tehran and world powers.

Iranian Foreign Minister Mohammad Javad Zarif said Tuesday he hoped the US Congress would not be swayed by "warmongers' propaganda" over the nuclear deal struck between Tehran and world powers.

"What happens in the US Congress, that's certainly a US issue," he told a news conference in Tunisia.

"We believe it's a mutually beneficial agreement," Zarif said of the July 14 accord on scaling down Iran's nuclear program in exchange for a lifting of international sanctions.

"And if people are not too much concerned with the propaganda being raged by warmongers in our region and outside our region, there's no reason for the deal to face any impediments in the United States," said the minister who negotiated the deal.

Congress is due to vote this month on whether to endorse the agreement between Iran and six world powers -- Britain, China, France, Germany, Russia and the United States.

On the battle against the Takfiri group, ISIL (so-called Islamic State in Iraq and Levant), Zarif called for a "multi-faceted" campaign.

"We believe and I think we agree with our Tunisian friends that the fight against ISIL is not simply a military operation," he said, using another name for ISIL.

"It has to be a multi-faceted cultural, religious, political, economic and if necessary military campaign against this threat," he said.

"We need to uproot the sources and the main reasons that give rise to this phenomenon."