Iran's foreign minister Javad Zarif is now in the Iraqi capital, Baghdad, on a two day visit.
Zarif and Iraqi President Barham Salih discussed ways to make the region more stable.
On Friday, protesters gathered in Baghdad, demanding their government stay out of the dispute between Iran and the US.
They're worried Iraq could become a battleground for a proxy war between the two rivals.
There's a significant US troop presence in Iraq relies on US and foreign troops to combat the threat of ISIL.
Al Jazeera's Charles Stratford reports from Baghdad.