Iran has agreed to a US request for a new round of talks on Iraq, according to reports this morning.
Iran has repeatedly blamed the violence in Iraq on the US-led invasion of the country in 2003.
For its part, the United States accuses Iran of arming and training Shia militias in Iraq, a charge Iranian officials deny.
On Sunday, an Iranian Foreign Ministry spokesman said that Washington had levelled "baseless accusations" at Tehran over its role in Iraq, which, like Iran, is predominantly Shia Muslim.
The United States has recently appeared to soften its rhetoric about Iran's involvement in Iraq, noting a sharp drop in mortar attacks on Baghdad's heavily fortified Green Zone.
The attacks have been blamed on Shia militias using weapons supplied from Iran.
