Iran's supreme leader Ayatollah Ali Khamenei on Monday said “enemies” were trying to drive a wedge between Tehran and Baghdad following deadly unrest in neighbouring Iraq.
"#Iran and #Iraq are two nations whose hearts and souls are tied together... Enemies seek to sow discord but they've failed and their conspiracy won't be effective," Khamenei was quoted as saying on his office's Twitter account.
State news agency IRNA said the supreme leader was reacting to recent violence in Iraq.
More than 100 people have been killed in Iraq since clashes erupted last week between protesters and security forces, the majority of them demonstrators struck by bullets.
The Iraqi authorities have accused “saboteurs” and unidentified snipers of targeting the protesters.
Iran has urged its citizens planning to take part in a major Shia pilgrimage in Iraq to delay their travel into the country over the violence.
Tehran has close but complicated ties with Baghdad, with significant influence among its Shia political groups.
The two countries fought a bloody war from 1980 to 1988 and Iran's influence in the country grew after the US-led invasion of Iraq toppled veteran dictator Saddam Hussein in 2003.